Omega Products USB-4751 Installation Manual

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User’s Guide

USB-4751/USB-4751L

48/24 Channel TTL Digital I/O

USB Data Acquisition Modules

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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.

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 the product, 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 2007 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.

Where Do I Find Everything I Need for

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M4570/0907

USB-4751/4751L

48/24-Channel Digital

I/O

USB Data Acquisition

Module

User Manual

Contents

Chapter 1 Introduction ..................................................... 2

1.1 Hardware Features.. . .. .. .. .. ........... .. . ........... ... . .. .. . .. .. . ........... 2

1.2 Software Overview............................................................ 3

1.2.1 More on the CD ....................... ................. ..................... 3

Chapter 2 Installation ....................................................... 6

2.1 Unpacking ......................................................................... 6

2.2 Driver Installation ............................................................. 7

2.3 Hardware Installation ........................................................ 9

2.4 Hardware Uninstallation ................................................... 9

Figure 2.1:Unplug or Eject Hardware Dialog .............. 10

Figure 2.2:Stop a Hardware device dialog box ............ 10

Chapter 3 Signal Connections ........................................ 12

3.1 Overview ......................................................................... 12

3.2 I/O Connectors ................................................................ 12

3.2.1 Pin Assignments .......................................................... 12

Figure 3.1:I/O Connector Pin Assignment .................. 12

Figure 3.2:Opto-22 CN1/CN2 ..................................... 13

3.2.2 I/O Connector Signal Description ................................ 14

Table 3.1:I/O Connector Signal Description ............... 14

3.2.3 LED Indicator Status Descript ion ................................ 14

Table 3.2:LED Indicator Status Description ................ 14

3.3 Digital I/O Connections .................................................. 15

3.3.1 Dry Contact Support for Digital Input ......................... 15

Figure 3.3:Digital Input Connections .......................... 15

3.4 Field Wiring Considerations ........................................... 16

Appendix A Specifications ................................................. 18

A.1 Digital Input/Output ........................................................ 18

A.2 Counter ............................................................................ 18

A.3 General ............................................................................ 18

v Table of Contents

USB-4751/4751L User Manual vi

1

2

Introduction

Sections include:

• Hardware Features

• Software Overview

Chapter 1 Introduction

Thank you for buying the USB-4751/4751L data acquisition module. The
USB-4751/4751L

is

a powerful data acquisition
(DAS) module for the USB port. It features a unique circuit design and
complete

functions for data acquisition and control.

1.1 Hardware Features

USB-4751/4751L features excellent measurement & control functions:

• 48/24 TTL digital I/O lines

• 50-pin Opto-22 compatible box header

• Emulates mode 0 of 8255 PPI

• Buffered circuits for higher driving capacity than 8255

• Interrupt handling

• Timer/ Cou nter interrupt capability

• Supports both dry and wet contact

• 50-pin Opto-22 compatible box header

• Compatible with USB 1.1/2.0

• Bus-powered

Note:

You can install up to sixteen USB-4751/4751 L’s

to a system becaus e of the restriction of device
BoardID

Note:

The power output of an USB port is 500 mA,

while the USB-4751/4751L requires 500mA
(Max.). This mean s that if an USB hub is used, it
will need an
more

external power supply to suppor t

than one USB-4751/4751L device.

Note:

For detailed specifications of USB-4751/4751L,
please refer to Appendix A,

Specifications.

USB-4751/4751L User Manual 2

1.2 Software Overview

Omega offers a rich set of DLL drivers, third-party driver support and
application software
functions
function library to help boost your application performance and work
seamlessly with development tools such as Visual C++, Visual

of your device. The Device Drivers feature a complete I/O

on the companion CD-ROM to help fully exploit the

1.2.1 More on the CD

For instructions on how to begin programming in each development tool,
some tutorial chapters are included in the Device Drivers Manual
reference. Please
the Device
also look at
since they can

The Device Drivers Manual can be found on the companion CD-ROM.
Alternatively, if
system, The
Start button:

Start/Programs/Omega USB-4700 Series/ Device Driver’s Manual

The example source code can be found under the corresponding installa-

folder such as the default installation path:

tion

Pr o g r a m F i l e s /Omega/USB-4700/Examples

refer to the corresponding sections in these chapters on

Drivers Manual to begin your programming efforts. You can

the example source code provided for each programming tool,

get you very well oriented.

you have already installed the Device Drivers on your

Device Drivers Manual can be readily accessed through the

3 Chapter 1

Basic.

for your

USB-4751/4751L User Manual 4

2

2

Installation

Sections include:

•

U

npacking

• Driver Installation

• Hardware Installation

• Hardware Uninstallation

Chapter 2 Installation

2.1 Unpacking

After receiving your USB-4751/4751L package, please inspect its con­tents first.

• USB-4751/4751L Module

• Shielded USB 2.0 Cable (1.8 m)

• Companion CD-ROM (DLL driver included)

The USB-4751/4751L Module harbors certain electronic components
vulnerable to
integrated circuits and certain components if preventive measures are not
carefully paid

antistat ic plast ic ba g, you sh ould t ake fol lowi ng precaut ions
possible ESD

• Touch the metal part of your computer chassis with your hand to dis-

• Make contact between the antistatic bag and ground before opening.

After taking out the module, you should first:

Inspect the module for any possible signs of external damage (loose or
damaged components,
notify
ately. Avoid using

• Avoid physical contact with materials that could hold static

USB-4751/4751L User Manual 6

The package should contain the following items:

electrostatic discharge (ESD). ESD could easily damage the

attention to. Before removing the module from the

damage:

static electricity accumulated on your body. One can also use a

charge
grounding strap.

etc.). If the module is visibly damaged, please

our service department or our local sales representative immedi-

electricity such

a damaged module with your system.

as

plastic, vinyl and Styrofoam.

to ward off

2.2 Driver Installation

We recommend you install the software driver before you install the
USB-4751/4751L
smooth installation process.

The 32-bit DLL driver Setup program for the USB-4751/4751L module is
included on the companion CD-ROM that is shipped
package. Please
driver software:

module into your system, since this will guarantee a

with your module

follow the steps on the following page to install the

7 Chapter 2

For further information on driver-related issues, an online version of the
Device Drivers Manual is

available by accessing the following path:

Start/Programs/Omega USB-4700 Series/ Device Driver’s Manual

USB-4751/4751L User Manual 8

2.3 Hardware Installation

Note: Make sure you have insta lle d th e so ftware driver

before you install
Section 2.2 Driver Installation )

the module (please refer to

After the DLL driver installation is completed, you can now go on to
install the USB-4751/4751L module

in

any USB port that supports the
USB 1.1/2.0 standard , on your comp uter . Please follow the steps below to
install the module on your system.

Step 1: Touch the metal part on the surface of your computer to neutral-

ize

the static electricity that might be in your body.

Step 2: Plug your USB module into the selected USB port. Use of exces-

sive

force must be avoided; otherwise the module might get damaged.

Note:

In case you installed the module without installing

the DLL driver , Win 200 0/XP will
module as an

“unknown device”. After reboot,it will
prompt you t o provid e neces sary
ignore the promp ting messages
driver according

to the steps describe d in Sec.2 .2.

recognize your

driver . Y o u shoul d

and set up the

After your module is installed, you can configure it using the Device
Manager. The Device Driver's

Manual can be found at:

Start/Programs/Omega USB-4700 Series/ Device Driver’s Manual

2.4 Hardware Uninstallation

Though the USB modules are hot swappable, we still recom- mend you
to follow the hardware un-installation
unpredictable damages

Step1:

Close the applications of the USB module.

Step2:

Right click the “Unplug or Eject Hardware” icon on your task bar.

to your device or your system.

9 Chapter 2

procedure to avoid any

Figure 2.1: Unplug or Eject Hardware Dialog

Step3:

Select “USB-4751/L Device” and press “Stop” Button.

Figure 2.2: Stop a Hardware device dialog box

Step4:

Unplug your USB device from the USB port.

Note: Please make sur e that you have closed the application

before unpluggin g
pected

system error or damage may occur.

the USB device, otherwise unex -

USB-4751/4751L User Manual 10

3

2

Signal Connections

Sections include:

•

O

verview

• Digital I/O Connections

• Field Wiring Considerations

Chapter 3 Signal Connections

3.1 Overview

Maintaining good signal connections is one of the most important factors
in ensuring that your application
correctly. A good signal
damage to your PC

connection can avoid unnecessary and costly

and other hardware devices.

3.2 I/O Connectors

USB-4751/4751L is equipped with one plug-in screw-terminal connector
and two
used

3.2.1 Pin Assignments

(one for USB-4751L) standard Opto-22 connectors that can be

with a variety of wiring boards on the market.

system is sending and receiving data

USB-4751/4751L User Manual 12

Figure 3.1: I/O Connector Pin Assignment

Figure 3.2: Opto-22 CN1/CN2

Opto-22 CN1

Opto-22 CN2 (USB-4751 Only)

1 PC07 2 GND 1 PC17 2 GND
3 PC06 4 GND 3 PC16 4 GND
5 PC05 6 GND 5 PC15 6 GND
7 PC04 8 GND 7 PC14 8 GND
9 PC03 10 GND 9 PC13 10 GND
11 PC02 12 GND 11 PC12 12 GND
13 PC01 14 GND 13 PC11 14 GND
15 PC00 16 GND 15 PC10 16 GND
17 PB07 18 GND 17 PB17 18 GND
19 PB06 20 GND 19 PB16 20 GND
21 PB05 22 GND 21 PB15 22 GND
23 PB04 24 GND 23 PB14 24 GND
25 PB03 26 GND 25 PB13 26 GND
27 PB02 28 GND 27 PB12 28 GND
29 PB01 30 GND 29 PB11 30 GND
31 PB00 32 GND 31 PB10 32 GND
33 PA07 34 GND 33 PA17 34 GND
35 PA06 36 GND 35 PA16 36 GND
37 PA05 38 GND 37 PA15 38 GND
39 PA04 40 GND 39 PA14 40 GND
41 PA03 42 GND 41 PA13 42 GND
43 PA02 44 GND 43 PA12 44 GND
45 PA01 46 GND 45 PA11 46 GND
47 PA00 48 GND 47 PA10 48 GND
49 +5V_OUT 50 GND 49 +5V_OUT 50 GND

13 Chapter 3

3.2.2 I/O Connector Signal Description

Table 3.1: I/O Connector Signal Description

Signal Ref. Direction Description

PA<0~7,
10~17>

PB<0~7,
10~17>

PC<0~7,
10~17>

+5V_OUT GND Outp ut +5V DC power
C<1,2>_Out GND Output Output pins of counter/ timer 1 and 2
C<1,2>_Gate GND Input Gate control pins of counter/ timer 1

C<1,2>_In GND Input External clock source of counter/ timer

INT_Out GND Output Interrupt output. This pin changes to

GND - - Digital ground

GND Input/Out-

put

GND Input/Out-

put

GND Input/Out-

put

Digital input/ output port A, channel
0~7 & channel 10~17.

Digital input/ output port B, channel
0~7 & channel 10~17.

Digital input/ output port C, channel
0~7 & channel 10~17.

and 2

1 and 2

logic 1 whenever the
USB-4751 generates an interru pt, an d
returns to logic 0 when the interrupt is
cleared.

3.2.3 LED Indicator Status Description

The USB Module is equipped with a LED indicator to show the current
status

of

the device. When you plug the USB device into the USB port,
the LED
is on.
information.

indicator will blink five times and then stay lit to indicate that it

Please refer to the following table for detailed LED indicator status

Table 3.2: LED Indicator St atus Descriptio n

LED Status Description
On Device ready for work

Off Device not ready to work
Slow Blinking (5 times) Device initialization
Fast Blinking

(Depends on data transfer speed).

Device working

USB-4751/4751L User Manual 14

3.3 Digital I/O Connections

3.3.1 Dry Contact Support for Digital Input

Each digital input channel accepts either dry contact or 0 ~ 5 VDC wet
contact inputs.
changes in external circuitry (e.g.,
circuitry) when
shows external circuitry with both
nected

as an input source to one of the card's digital input channels.

Dry contact capability allows the channel to respond to

the closing of a switch in the external

no voltage is present in the external circuit. Figure 3-3

wet and dry contact components, con-

Figure 3.3: Digital Input Connections

15 Chapter 3

3.4 Field Wiring Considerations

• When you use USB-4751/4751L to acquire data from outside, noises in

the environment
surements
be helpful to
signal sources and

• The signal cables must be kept away from strong electromagnetic

sources such as
welding machines,
ference. Keep the
since it can significantly

• If the cable travels through an area with significant electromagnetic

interference, you should
as the analog input cable.
together and

connected to one point at the signal source ground.

be

• Avoid running the signal cables through any conduit that might have

lines in it.

power

• If you have to place your signal cable parallel to a power line that has a

high

voltage or high current running through it, try to keep a safe dis-

tance

between them. Or place the signal cable in a right angle to the

power line

USB-4751/4751L User Manual 16

might significantly affect the accuracy of your mea-

if

due cautions are not taken. The following measures will
reduce possible interference running signal wires between

the USB-4751/4751L.

power lines, large electric motors, circuit breakers or

since they may cause strong electromagnetic inter-

analog signal cables away from any video monitor,

affect a data acquisition system.

adopt individually shielded, twisted-pair wires

This type of cable has its signal wires twisted

shielded with a metal mesh. The metal mesh should only

to minimize the undesirable effect.

A

2

Specifications

Appendix A Specifications

A.1 Digital Input/Output

Channels

Programming

Mode

Input Voltage

Output Voltage

+5V Output

Interrupt Mode

A.2 Counter

Channels

Resolution

Compatibility

Base Clock

Frequency

measurement

PWM Generation

External Input Divide

A.3 General

I/O Connector Type
Dimensions
Power

Consumption
Temperature Operation

Relative Humidity

USB-4751/4751L User Manual 18

48 Bi-directional (24 for USB-4751L)
8255 PPI Mode0

Low

High

Low

High

100mA max.
PC0 source; PC4 gate/PC0 sourc e

Opto-22 * 2 and 10-pin screw terminal *1
132 X 80 X 32 mm (5.2” X 3.2” X 1.3”)

5 V @ 500 mA max.

Storage

5%~95% RH non-condensing (refer to IEC 68-2-1, 2)

0.8 V max

2.0 V min

0.5 V max. @ 12mA (sink)

3.8 V min. @ -12mA (source)(each line)

3.8 V min.@5mA(source)(high of every line)

2 independent

32-bit counters (low 16bit by hardware and high 16bit by ARM)

TTL compatible logical level input

External
Internal

Input frequency from 0.1Hz to 10Mhz

8MHz max. 2 independent program-

20MHz max.

2Hz to 10Mhz
2 to 65535

0~60° C (32~140° F) (refer to IEC 68-2-1, 2)

-20~70° C (-4~158° F)

mable clock sources

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 the product, 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 2007 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.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

TEMPERATURE

䡺⻬

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

䡺⻬

Wire: Thermocouple, RTD & Thermistor

䡺⻬

Calibrators & Ice Point References

䡺⻬

Recorders, Controllers & Process Monitors

䡺⻬

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

䡺⻬

Transducers & Strain Gages

䡺⻬

Load Cells & Pressure Gages

䡺⻬

Displacement Transducers

䡺⻬

Instrumentation & Accessories

FLOW/LEVEL

䡺⻬

Rotameters, Gas Mass Flowmeters & Flow Computers

䡺⻬

Air Velocity Indicators

䡺⻬

Turbine/Paddlewheel Systems

䡺⻬

Totalizers & Batch Controllers

pH/CONDUCTIVITY

䡺⻬

pH Electrodes, Testers & Accessories

䡺⻬

Benchtop/Laboratory Meters

䡺⻬

Controllers, Calibrators, Simulators & Pumps

䡺⻬

Industrial pH & Conductivity Equipment

DATA ACQUISITION

䡺⻬

Data Acquisition & Engineering Software

䡺⻬

Communications-Based Acquisition Systems

䡺⻬

Plug-in Cards for Apple, IBM & Compatibles

䡺⻬

Datalogging Systems

䡺⻬

Recorders, Printers & Plotters

HEATERS

䡺⻬

Heating Cable

䡺⻬

Cartridge & Strip Heaters

䡺⻬

Immersion & Band Heaters

䡺⻬

Flexible Heaters

䡺⻬

Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

䡺⻬

Metering & Control Instrumentation

䡺⻬

Refractometers

䡺⻬

Pumps & Tubing

䡺⻬

Air, Soil & Water Monitors

䡺⻬

Industrial Water & Wastewater Treatment

䡺⻬

pH, Conductivity & Dissolved Oxygen Instruments

M4570/0907