Omega Products DOTX-45 User Manual

2-Wire Isolated Dissolved Oxygen
Transmitter System

DOTX-45

$

1325

Complete System

DOTX-45 transmitter,

$675, shown smaller

than actual size.

⻬ Reliable 3-Electrode

Amperometric Sensor

⻬ Replaceable Sensor Cartridge
⻬ Sensor Membrane

Puncture/Tear Diagnostic

⻬ Microprocessor-Based System
⻬ Large, Dual-Display Format
⻬ Loop Powered, Fully Isolated

Sensor Features

The DOE-45PA dissolved oxygen sensor
is a highly dependable membrane-covered
galvanic sensor. The polymer membrane
has hydrophobic properties to help resist
fouling from biological growth and
maximize diffusion of oxygen into the
sensor. The DOE-45PA also has
automatic temperature compensation to
correct for membrane permeability errors.

Transmitter Features

The microprocessor-based transmitter is
loop powered and fully isolated for high
reliability. The transmitter includes devices
that protect the system from power surges
and brownout events. The large,
high-contrast, super-twist display is
readable over a wide operating temperature
range, even in low-light conditions. The
main display line consists of large,
segmented characters with measurement
units. The secondary display line displays
calibration and diagnostic messages in
readable dot-matrix characters. Two of four
measured parameters can be displayed
simultaneously. Programming is intuitive,
with a 4-button, menu-driven interface.
The 4 to 20 mA transmitter output can be
configured to represent any portion of the
measurement range. Output hold, alarm,
and simulation features give the user
complete control of the system output
under any condition. Diagnostic messages
clearly describe system conditions, which
eliminates confusing error codes.
The flexible calibration method includes
stability monitors that check temperature
and main parameter stability before
accepting data.

Specifications
(DOE-45PA Sensor)

Measuring Range:

0 to 40 ppm

Sensor Cable: 9.1 m (30')
Measurement Response Time:

90% in less than 3 minutes

Measurement Principle:

Membrane covered galvanic

Electrode Material:

Cathode: Platinum

Anode: Lead
Electrolyte: Potassium chloride based
Pressure Range:

0 to 150 psig @ 25°C (77°F)

Temperature Compensation: Pt100
Temperature Range:

-5 to 55°C (23 to 131°F)

Minimum Flow Rate:

6 mm (0.02') per second

DOE-45PA sensor,

$650, sold separately,

shown smaller than

actual size.

Membrane Thickness:

50 microns
Membrane Material: FEP

(fluorinated ethylene propylene)

Wetted Materials: 316 SS, FKM, Noryl
Sensor Cable: 5-conductor
Sensor-to-Transmitter Distance:

305 m (1000')

Mounting: Submersion 1 NPT
Shipping Weight: 0.45 kg (1 lb)

Specifications
(DOTX-45 Transmitter)
Performance Specifications

Displayed Parameters: Main input,

0 to 40.0 ppm

% Saturation: 0 to 200%
Loop Current: 4 to 20 mA
Sensor Temperature:

0 to 50°C (32 to 122°F)
Power: 16 to 35 Vdc

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Main Parameter Range: 0 to 40 ppm
Repeatability: 0.1% of span or better
Sensitivity: 0.05% of span
Non-Linearity: 0.1% of span
Stability: 0.1% of span per 24 hours,

non-cumulative

Warm-Up Time:

4 seconds to rated performance

Supply Voltage Effects: ±0.05% of span
Transmitter Response Time: 4 seconds to

90% of step input at lowest setting
Temperature Drift: Span or zero,

0.02% of span/°C
Temperature Compensation: 0 to 50°C

(32 to 122°F), Pt1000 element; sensor is
internally compensated for membrane
permeability changes with temperature

Sensor-to-Transmitter Distance:

305 m (1000')
Enclosure: NEMA 4X (IP66),

polycarbonate, stainless steel hardware,
weatherproof and corrosion resistant,
112 H x 112 W x 89 mm D
(4.4 x 4.4 x 3.5")

Mounting Options: Wall, panel, pipe,
DIN rail, integral-sensor

Conduit Openings: 2-PG9 openings,
1-1 NPT center opening, cordgrips and
plug included

Weight/Shipping Weight: 0.45 kg (1 lb)
Display: Large, high-contrast, super-twist

LCD; 4-digit main display with sign,

19.1 mm (0.75"), 7-segment characters;
12-digit secondary display, 7.6 mm (0.3")
5 x 7 dot matrix character

Keypad: 4-key membrane type
with tactile feedback, polycarbonate
with UV coating, integral EMI/static
shield and conductively coated window

Operating Temperature:

-20 to 60°C (-4 to 140°F)

Storage Temperature:

-30 to 70°C (-22 to 158°F)

Ambient Humidity:

0 to 95%, non-condensing
Location: Designed for hazardous

and non-hazardous areas

EMI/RFI Influence:

Designed to EN 61326-1
Voltage Range: 16 to 35 Vdc

(2-wire device)

Output Isolation: 600V galvanic isolation
Transmitter Cable Type:

Belden twisted-pair, shielded
Filter: Adjustable 1 to 99 seconds additional

damping to 90% step input
Temperature Input: Selectable Pt1000 or

Pt100, automatic compensation

Recommended Reference Book:

Handbook of Drinking Water Quality,

ES-2036, $160. Visit

omega.com/bobi for Additional Books

DOTX-45, $675.

$650, sold separately, shown

DOE-45PA sensor,

smaller than actual size.

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description
DOTX-45 $675 Dissolved oxygen transmitter
DOTX-45-115VAC-R2 925 Dissolved oxygen transmitter with relays
DOE-45PA** 650 Dissolved oxygen sensor
PSU-93 40 Unregulated power supply
PHTX-45-SMH 95 Submersion mounting hardware, 1.8 m (6')

Accessories

Model No. Price Description
DOE-45PA-DOE** $35 DO electrolyte, 4 oz bottle
DOE-45PA-EC 35 Electrolyte chamber
DOE-45PA-MH 30 316 SS membrane holder
DOE-45PA-RLE 15 Replacement lead electrode
DOE-45PA-RM** 15 Membranes, 5 mil 10-pack
DOE-45PA-SE 200 Submersible sensing-element body
DOE-45PA-SH 400 Submersible sensing-element holder assembly
DOE-45PA-SM 250 Submersible sensing module

Comes complete with wall mount bracket and operator’s manual.

When purchasing the DOE-45PA for the first time it is necessary to also purchase the

**

DOE-45PA-DOE electrolyte solution and DOE-45PA-RM membranes.
Ordering Examples: DOTX-45, dissolved oxygen transmitter, DOE-45PA, sensor, DOE-45PA-DOE,

electrolyte solution 4 oz bottle, DOE-45PA-RM, 5 mil 10-pack membranes,
$675 + 650 + 35 + 15 = $1375.

Ordering Examples: DOTX-45, dissolved oxygen transmitter, DOE-45PA, sensor, PSU-93,
unregulated power supply, DOE-45PA-DOE, electrolyte solution 4 oz bottle, DOE-45PA-RM, 5 mil
10-pack membranes, DOE-45PA-MH, 316SS membrane holder, $675 + 650 + 40 + 35 + 15 + 30 = $1445.

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