Omega HX94A User guide

HX94A SERIES

RH/Temperature Transmitter

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User’s Guide

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Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford, CT 06907-0047
Toll-Free: 1-800-826-6342 Tel: [phone]
FAX: [phone] e-mail: [email protected]

Canada: 976 Bergar

Laval (Quebec), Canada H7L 5A1
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico: En Español: 001 [phone] FAX: [phone]

[email protected] e-mail: [email protected]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [email protected]

Czech Republic: Frystatska 184

733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

France: Managed by the United Kingdom Office

Toll-Free: 0800 466 342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

Germany/Austria: Daimlerstrasse 26

D-75392 Deckenpfronn, Germany
Toll-Free: 0 800 6397678 TEL: [phone]
FAX: [phone] e-mail: [email protected]

United Kingdom: OMEGA Engineering Ltd.

ISO 9001 Certified

One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [email protected]

OMEGAnet®Online Service Internet e-mail

omega.com [email protected]

It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

TABLE OF

CONTENTS

HX94A SERIES

RH/Temperature Transmitter

i

Section Page

1. General Description .................................................................... 1

2. Unpacking .................................................................................... 1

3. Theory of Operation ................................................................... 2

4. Mounting ..................................................................................... 3

5. Electrical Connections ................................................................ 4

6. Wiring Examples ....................................................................... 5

7. Relative Humidity Output Calculations ................................ 5

8. RH Measured Vs Output Reading Table ................................. 6

9. Temperature Output Calculations .......................................... 6

10. Calibration ................................................................................... 6

11. Calibration Procedure For HX94AC

Relative Humidity Adjustment ................................................ 7

12. Calibration Procedure For HX94AC

Temperature Adjustment ......................................................... 8

13. Calibration Procedure For HX94AV

Relative Humidity Adjustment ................................................ 9

14. Calibration Procedure For HX94AV

Temperature Adjustment ........................................................ 10

15. Maintenance .............................................................................. 11

16. Specifications ............................................................................. 12

17. General Specifications .............................................................. 13

FIGURES

HX94A SERIES
RM/Temperature Transmitter

ii

Figure Page

Figure 1 Basic Transmitter Set-up

With Current Loop Output .............................................. 2

Figure 2 Dimensions ......................................................................... 3

Figure 3 Mounting ........................................................................... 3

Figure 4 Current Transmitter Wiring Example

(4 - 20 mA) .......................................................................... 5

Figure 5 Voltage Transmitter Wiring Example

(0 - 1 Vdc)............................................................................. 5

Figure 6 HX94AC Calibration Procedure

Relative Humidity Adjustment ...................................... 7

Figure 7 HX94AC Calibration Procedure

Temperature Adjustment ................................................ 8

Figure 8 HX94AV Calibration Procedure

Relative Humidity Adjustment ...................................... 9

Figure 9 HX94AV Calibration Procedure

Temperature Adjustment .............................................. 10

Figure 10 Sensor Filter Cap Removal ............................................ 11

1

HX94A SERIES

RH/Temperature Transmitter

1

1. General Description

The OMEGA®HX94A Series Relative Humidity/Temperature
Transmitter’s provide a linearized and temperature compensated output
signal of 4 to 20 mA or 0 to 1 Vdc depending upon the model selected for
both relative humidity and temperature measurement. The output signals
have been calibrated and scaled 0 to 100% for Relative Humidity and 0 to
100ºC (32 to 212ºC) for temperature. A thin film polymer capacitor senses
relative humidity while an 100 ohm RTD measures temperature, both are
protected by a stainless steel filter that is easily removed for cleaning. The
Nema-4 stainless steel enclosure and cable entry connection provides
weathertight protection.

2. Unpacking

Remove the packing list and verify that you have received all your
equipment. If you have any questions about the shipment, please call
our Customer Service Department at:

1-800-622-2378 or 203-359-1660. On the web you can find us at:
omega.com e-mail: [email protected]

When you receive the shipment, inspect the container and equipment
for any signs of damage. Note any evidence of rough handling in
transit. Immediately report any damage to the shipping agent.

The carrier will not honor any damage claims unless all shipping material is
saved for inspection. After examining and removing contents, save packing
material and carton in the event reshipment is necessary.

The following items are supplied in the box with your HX94A transmitter.

• This Manual, # M2750A (1 ea.)

• Wall/Duct Mounting Kit (1 ea.)

• 4-Pin Mating Connector; with connector models only (1ea.)

• Dewpoint Card (1 ea.)

Additional Transmitter Models Available
Model Description

HX94AC RH/Temperature Transmitter (4 to 20 mA Output) with 4

Pin Connector.

HX94AV RH/Temperature Transmitter (0 - 1 Vdc Output) with 4

Pin Connector.

HX94ACW RH/Temperature Transmitter (4 to 20 mA Output) with 1

m (3') lead wires.

NOTE

2

HX94AVW, RH/Temperature Transmitter (0 - 1 Vdc Output) with

1 m (3') lead wires.

HX94ACNPT RH/Temperature Transmitter (4 to 20 mA Output)

with 1/2" male NPT fitting and 1 m (3') lead wires.

HX94AVNPT RH/Temperature Transmitter (0 - 1 Vdc Output) with

1/2" male NPT fitting and 1 m (3') lead wires.

3. Theory of Operation

A 4-20 mA loop is a series loop in which a transmitter will vary the
current flow depending on the input to the transmitter. In the HX94A
Series the amount of current allowed to flow in the loop will vary
depending on the relative humidity or temperature being measured by
the sensor(s). Some advantages of a current output over a voltage
output is that the signal measured is less susceptible to electrical noise
interference and the loop can support more than one measuring
instrument as long as the maximum loop resistance is not exceeded.

A typical application utilizing a current loop will normally consist of a
power supply, the transmitter and a meter, recorder or controller to
measure the current flow. The loop resistance in the sum of the
measuring instruments and wire used. The maximum allowable loop
resistance for the HX94A to function properly is found by using the
following formula:

R

max

= (power supply voltage – 6 volts) ÷ 0.02 amps

EXAMPLE: (When using a 24 Vdc power supply).

R

max

= (24 – 6) ÷ 0.02 amps = 900 ohms max loop resistance

Figure 1 - Basic Transmitter Set-up With Voltage Output

3

HX94A SERIES
RH/Temperature Transmitter

DPi8 Panel Meter

+

45%RH

–

PSU-93

DPi8 Panel Meter

+

24V

+–

23°C

–

GREEN WIRE

BLACK WIRE

WHITE WIRE

RED WIRE

HX94A

3

Complimentary Instruments

Unregulated 16 -23 Vdc Power Supply, OMEGA®Part No.: PSU-93
Regulated 24 Vdc Power Supply, OMEGA

®

Part No.: PSR-24L

iSeries

®

Panel Meters and Controllers

Recommended Accessories

Shielded Transmitter Cable, OMEGA®Part No.: TX4-100 (100 ft)
RH Calibration Kit, OMEGA

®

Part No.: HX92-CAL

Spare 4 pin mating connector, OMEGA

®

Part No.: HX94-MC

4. Mounting

OMEGA’s HX94A transmitter’s are designed for either wall or duct
mounting. A wall/duct mounting kit is included with each unit.

Figure 2 - HX94A Dimensions

Figure 3 - HX94A Mounting

38.1 (0.75) DIA.DIMENSIONS mm (in)

259 (10.20)

4

HX94A SERIES

RH/Temperature Transmitter

DUCT WALL

MOUNTING GASKET

MOUNTING PLATE

MOUNTING SCREW

MOUNTING BUSHING

HX94A

HX94A

CLAMP

MOUNTING

SCREW

MOUNTING
NUT

4

5. Electrical Connections

All electrical connections and wiring should be performed by a suitably
trained professional only.

Models: HX94AC
(2-Wire Current Output with connector)

Temperature Relative Humidity

Pin #2. + Power Supply Pin #1. + Power Supply

Pin #3. 4-20 mA Output Pin #4. 4-20 mA Output

Connector Body: Shield, Earth Ground

Models: HX94ACW, HX94ACNPT
(2-Wire Current Output with stripped leads)

Temperature Relative Humidity

White Wire: + Power Supply Black Wire: + Power Supply

Red Wire: 4-20 mA Output Green Wire: 4-20 mA Output

Bare Wire: Shield, Earth Ground

Models: HX94AV
(3-Wire Voltage Output with connector)

Temperature Relative Humidity

Pin #1. + Power Supply Pin #1. + Power Supply

Pin #3. 0 - 1 Vdc Output Pin #4. 0 - 1 Vdc Output

Pin #2. - Power Supply Pin #2. - Power Supply

Connector Body: Shield, Earth Ground

Models: HX94AVW, HX94AVNPT
(3-Wire Voltage Output with stripped leads)

Temperature Relative Humidity

Black Wire: + Power Supply Black Wire: + Power Supply

Red Wire: 0 - 1 Vdc Output Green Wire: 0 - 1 Vdc Output

White Wire: - Power Supply White Wire: - Power Supply

Bare Wire: Shield, Earth Ground

CAUTION

5

HX94A SERIES
RH/Temperature Transmitter

5

6. Wiring Examples

For current output models (4 to 20 mA)

Figure 4 - Current Transmitter Wiring Example

For voltage output models (0 to 1 Vdc)

Figure 5 - Voltage Transmitter Wiring Example

7. Relative Humidity Output Calculations

To calculate % Relative Humidity by measuring the current or voltage
output use the following formulas.

For current output:

% RH = (Current measured in miliamps – 4) ÷ 0.16

EXAMPLE: (11.04 mA – 4) ÷ 0.16 = 44% RH

For voltage output:

% RH = (Voltage measured in volts x 100)

EXAMPLE: 0.44 x 100 = 44% RH

+

45%RH

–

PSU-93

DPi8 Panel Meter

+

24V

+–

23°C

–

GREEN WIRE

BLACK WIRE

WHITE WIRE

RED WIRE

HX94A

6

HX94A SERIES

RH/Temperature Transmitter

DPi8 Panel Meter

+

45%RH

–

PSU-93

DPi8 Panel Meter

+

24V

+–

23°C

–

GREEN WIRE

BLACK WIRE

WHITE WIRE

RED WIRE

HX94A

6

8. RH Measured Vs Output Reading Table

9. Temperature Output Calculations

To calculate Temperature by measuring the current or voltage output
use the following formulas.

For Current output in ºC (0 to 100ºC)

ºC = (Output measured in miliamps – 4) ÷ 0.16 = ºC

EXAMPLE: (8.0 mA – 4) ÷ 0.16 = 25ºC
For Current output ºF (32 to 212ºF)

ºF = (Output measured in miliamps – 4) ÷ 0.08888 +32 = ºF

EXAMPLE: (8.0 mA – 4) ÷ 0 .08888 +32 = 77ºF
For Voltage output in ºC (0 to 100ºC)

ºC = (Output measured in volts ÷ 0.10) = ºC

EXAMPLE: (0.25 Vdc ÷ 0.10) = 25ºC
For Voltage output ºF (32 to 212ºF)

ºF = (Output measured in volts ÷ 0.005555) +32 = ºF

EXAMPLE: (0.25 Vdc ÷ 0.005555) +32 = 77ºF

10. Calibration

Your transmitter has been factory calibrated to meet or exceed the
specifications outlined in this manual. To maintain original
specifications it is generally recommended that your transmitter be
recalibrated on an annual basis depending on operating conditions.

% Relative

Output

Humidity Current (mA) Voltage (Vdc)

5 4.8 0.05
10 5.6 0.10
15 6.4 0.15
20 7.2 0.20
25 8.0 0.25
30 8.8 0.30
35 9.6 0.35
40 10.4 0.40
45 11.2 0.45
50 12.0 0.50
55 12.8 0.55
60 13.6 0.60
65 14.4 0.65
70 15.2 0.70
75 16.0 0.75
80 16.8 0.80
85 17.6 0.85
90 18.4 0.90
95 19.2 0.95

8

HX94A SERIES
RH/Temperature Transmitter

7

11. Calibration Procedure for HX94AC (all styles)

Relative Humidity Adjustment

Recommended equipment:

• RH Calibration Kit, OMEGA®Model No.: HX92-CAL

• Handheld Digital Multi-meter, OMEGA®Model No.: HHM29B

• Unregulated DC Power Supply, OMEGA®Model No.: PSU-93 or
Regulated DC Power Supply, OMEGA

®

Model No.: PSR-24L

1. Remove sensor head and main electronics boards from the stainless

steel housing.

2. Connect transmitter as shown in the figure below.

3. Apply power to transmitter and allow to warm up for 10 min.

4. Place the sensor head into the 11% RH calibration bottle as shown

and allow the readings to stabilize for 10 min.

5. Adjust potentiometer “P1” for an output reading of 5.76 mA.

6. Place the sensor head into the 75% RH calibration bottle and allow

the readings to stabilize for 10 min.

7. Adjust potentiometer “P2” for a output reading of 16.0 mA.

8. Repeat steps 4, 5, 6, 7 as necessary until proper readings are

maintained.

9. Reinstall the sensor head and main electronics back into the stainless

steel housing.

10. Calibration complete.

Figure 6 - HX94AC Calibration Procedure

Relative Humidity Adjustment

CURRENT METER

12.00 mA

+–

POWER SUPPLY

+

24V

–

P3

P2

P1

HX92CAL-KIT

HX94AC MAIN BOARD

FAC TORY

SETTING

ONLY

BLACK WIRE
RED WIRE

GREEN WIRE

WHITE WIRE

11

HX94A SERIES

RH/Temperature Transmitter

NOTE: Do not
adjust P3. This is
a factory setting.

8

12. Calibration Procedure for HX94AC

Temperature Adjustment

Recommended equipment:

• Thermistor Temperature Meter, OMEGA®Model No.: HH41

• Thermistor Probe, OMEGA®Model No.: ON-403-PP

• Handheld Digital Multi-meter, OMEGA®Model No.: HHM29B

• Unregulated DC Power Supply, OMEGA®Model No.: PSU-93 or
Regulated DC Power Supply, OMEGA

®

Model No.: PSR-24L

1. Remove sensor head and main electronics boards from the stainless

steel housing.

2. Connect transmitter as shown in figure below.

3. Apply power to transmitter and allow unit to warm up for 10 min.

4. Place a precession temperature meter/probe like the recommended

HH41 meter and ON-403-PP probe next to the sensor head of your
HX94A. Record the ambient temperature measured by the precession
meter/probe.

5. Based on the ambient temperature that you measured in step 4,

calculate what the correct “Output Setting” should be for your
HX94A.

Use one of these two formulas:
Ambient Temperature (°C) x (16/100) + 4 = Output Setting

Example: (22°C) x (0.16) + 4 = 7.52 mA

Ambient Temperature (°F - 32) x (16/180) + 4 = Output Setting

Example: (72°F - 32) x (0.0888) + 4 = 7.55 mA

6. Adjust potentiometer “P4” for the correct output reading from your

HX94A you calculated in step 5.

7. Calibration complete.

Figure 7 - HX94AC Calibration Procedure

Temperature Adjustment

BLACK WIRE
RED WIRE
GREEN WIRE
WHITE WIRE

HX94AC MAIN BOARD

CURRENT METER

POWER SUPPLY

12.00 mA

24V

P4

P5

+

+

–

–

23.4°C

HH40 METER

FAC TORY

SETTING

ONLY

12

HX94A SERIES
RH/Temperature Transmitter

13. Calibration Procedure for HX94AV

Relative Humidity Adjustment

Recommended equipment:

• Humidity Calibration Kit, OMEGA®Model No.: HX92-CAL

• Handheld Digital Multi-meter, OMEGA®Model No.: HHM29B

• Unregulated DC Power Supply, OMEGA®Model No.: PSU-93 or
Regulated DC Power Supply, OMEGA

®

Model No.: PSR-24L

1. Remove sensor head and main electronics boards from the stainless

steel housing.

2. Connect transmitter as shown in figure below.

3. Apply power to transmitter and allow to warm up for 10 min.

4. Place the sensor head into the 11% RH calibration bottle as below and

allow the readings to stabilize for 10 min.

5. Adjust potentiometer “P3” for an output reading of 0.110 Vdc.

6. Place the sensor head into the 75% RH calibration bottle and allow

the readings to stabilize for 10 min.

7. Adjust potentiometer “P2” for a output reading of 0.750 Vdc.

8. Repeat steps 4, 5, 6, 7 as necessary until proper readings are

maintained.

9. Reinstall the sensor head and main electronics back into the stainless

steel housing.

10. Calibration complete.

Figure 8 - HX94AV Calibration Procedure

Relative Humidity Adjustment

9

13

HX94A SERIES

RH/Temperature Transmitter

WHITE WIRE

RED WIRE

GREEN WIRE

BLACK WIRE

VOLTAGE METER

0.50 Vdc

+–

POWER SUPPLY

+

24V

–

P3

P2

HX92CAL-KIT

HX94AV MAIN BOARD

10

14. Calibration Procedure for HX94AV

Temperature Adjustment

Recommended equipment:

• Thermistor Temperature Meter, OMEGA®Model No.: HH41

• Thermistor Probe, OMEGA®Model No.: ON-403-PP

• Handheld Digital Multi-meter, OMEGA®Model No.: HHM29B

• Unregulated DC Power Supply, OMEGA®Model No.: PSU-93 or
Regulated DC Power Supply, OMEGA

®

Model No.: PSR-24L

1. Remove sensor head and main electronics boards from the stainless

steel housing.

2. Connect transmitter as shown in figure below.

3. Apply power to transmitter and allow unit to warm up for 10 min.

4. Place a precession temperature meter/probe like the recommended

HH41 meter and ON-403-PP probe next to the sensor head of your
HX94A. Record the ambient temperature measured by the
meter/probe.

5. Based on the ambient temperature that you measured in step 4.,

calculate what the correct “Output Setting” should be for your
HX94A.

Use one of these two formulas:
Ambient Temperature (°C) x (1/100) = Output Setting

Example: 22°C x 0.010 = 0.220 Vdc

Ambient Temperature (°F - 32) x (1/180) = Output Setting

Example: (72°F - 32) x (0.0888) + 4 = 7.55 mA

6. Adjust potentiometer “P4” for the correct output reading from your

HX94A you calculated in step 5.

7. Calibration complete.

Figure 9 - HX94AV Calibration Procedure

Temperature Adjustment

WHITE WIRE

GREEN WIRE

BLACK WIRE

RED WIRE

HX94AV MAIN BOARD

VOLTAGE METER

POWER SUPPLY

0.50 Vac

24V

P4

P5

+

+

–

–

23.4°C

HH40 METER

FAC TORY

SETTING

ONLY

14

HX94A SERIES
RH/Temperature Transmitter

15. Maintenance

If your Humidity transmitter will be used in a dusty environment, the
protective sensor filter, if clogged, may be removed for cleaning.
Unscrew the protective cover and gently blow compressed air through
the filter screen. A soft brush may also be used to remove dirt particles
from the screen.

If the sensor is subjected to 100% condensation, it must be dried to
obtain correct readings. There will be no permanent damage or
calibration shift to the unit.

Units should not be exposed to high concentrations of ammonia or
alcohol vapors.

Figure 10 - Sensor Filter Cap Removal

11

15

HX94A SERIES

RH/Temperature Transmitter

FILTER SCREEN

12

16. Specifications

Relative Humidity

Measuring Range: 3 - 95% (non-condensing)
Accuracy: ±2.5% @ 22°C (72ºF) from 20 to 80% RH;

±3.1% @ 22°C (72ºF) below 20 and above
80% RH; with an added temperature
coefficient error of ±0.1% RH/°F (both
increasing and decreasing in temperature).

Repeatability: ± 1 % RH
Operating

Temperature Range: 0 to 100ºC (32 to 212ºF)
Output:

Model: HX94AC 4 to 20 mA (Scaled for 0 to 100% RH)

Model : HX94AV 0 to 1 Vdc (Scaled for 0 to 100% RH)
Power: 6 –30 Vdc @ 20mA
Max Loop Resistance: Ohms = (V supply – 6 V)/0.02 A
Max Output Load: 200 Ohms (Voltage models)
RH Time Constant (90%

response at 25ºC, in
moving air at 1m/s): >10 seconds, 10 to 90% RH

>15 seconds, 90 to 10% RH

Sensor Type: Thin Film Polymer Capacitor

Temperature

Measuring Range: 0 to 100ºC (32 to 212ºF)
Accuracy: ±0.6ºC (1ºF)
Repeatability: ± 0.3ºC (0.5ºF)
Output:

Model: HX94AC4 to 20 mA, Scaled 0 to 100ºC (32 to 212ºF)

Model : HX94AV 0 to 1 Vdc, Scaled 0 to 100ºC (32 to 212ºF)
Power: 12 - 30 Vdc @ 30mA
Max Loop Resistance: Ohms = (V supply – 6 V)/0.02 A
Sensor Type: 100 Ohm Platinum RTD

16

HX94A SERIES
RH/Temperature Transmitter

13

17. General Specifications

Enclosure Housing: 316 Stainless Steel, Nema-4

Electrical Connections
HX94AC, HX94AV: 1 m (3') 4-conductor shielded PVC cable

with connector termination. 4 pin mating
connector included that accepts 26 to 18
AWG wire.

HX94ACW, HX94AVW, 1 m (3') 4 conductor , shielded PVC
HX94ACNPT cable with stripped lead termination.
HX94AVNPT:
Dimensions: See “Mounting” Section

Weight 200 g. (7 oz)

(with mounting kit)

17

HX94A SERIES

RH/Temperature Transmitter

14

NOTES:

HX94A SERIES
RH/Temperature Transmitter

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds
an additional one (1) month grace period to the normal one (1) year product warranty to
cover handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be
repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting
from any action of the purchaser, including but not limited to mishandling, improper
interfacing, operation outside of design limits, improper repair, or unauthorized modification.
This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows
evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture
or vibration; improper specification; misapplication; misuse or other operating conditions
outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes
liability for any damages that result from the use of its products in accordance with
information provided by OMEGA, either verbal or written. OMEGA warrants only
that the parts manufactured by the company will be as specified and free of
defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY
KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL
IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total
liability of OMEGA with respect to this order, whether based on contract, warranty,
negligence, indemnification, strict liability or otherwise, shall not exceed the
purchase price of the component upon which liability is based. In no event shall
OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1)
as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or
activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or
with any nuclear installation or activity, medical application, used on humans, or misused in
any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER
language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from
any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to
prevent breakage in transit.

FOR WARRANTY

RETURNS, please have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which

the product was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the

COST of the repair,

2. Model and serial number of theproduct, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2009 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without
the prior written consent of OMEGA ENGINEERING, INC.

M2750A/0509

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䡺⻬

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

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Wire: Thermocouple, RTD & Thermistor

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Calibrators & Ice Point References

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Recorders, Controllers & Process Monitors

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Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

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Transducers & Strain Gages

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Load Cells & Pressure Gages

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Displacement Transducers

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Instrumentation & Accessories

FLOW/LEVEL

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Rotameters, Gas Mass Flowmeters & Flow Computers

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Air Velocity Indicators

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Turbine/Paddlewheel Systems

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Totalizers & Batch Controllers

pH/CONDUCTIVITY

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pH Electrodes, Testers & Accessories

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Benchtop/Laboratory Meters

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Controllers, Calibrators, Simulators & Pumps

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Industrial pH & Conductivity Equipment

DATA ACQUISITION

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Data Acquisition & Engineering Software

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Communications-Based Acquisition Systems

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Plug-in Cards for Apple, IBM & Compatibles

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Datalogging Systems

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Recorders, Printers & Plotters

HEATERS

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Heating Cable

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Cartridge & Strip Heaters

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Immersion & Band Heaters

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Flexible Heaters

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Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

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Metering & Control Instrumentation

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Refractometers

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Pumps & Tubing

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Air, Soil & Water Monitors

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Industrial Water & Wastewater Treatment

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pH, Conductivity & Dissolved Oxygen Instruments