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The model PHTX-014 pH two wire transmitter is designed 

to provide a standard 4 to 20 mA current output which is

proportional to the pH being measured. Its small size and

encapsulated construction allow for easy installation and 

will accommodate any pH electrode with a BNC connector.

Temperature compensation is either manual or automatic 

with use of any 1000Ω Platinum RTD.

The PHTX-212 is the same as the PHTX-014 but with a range of

2 to 12 pH. This is a popular choice for use with recorders or any

application where it is convenient to divide the output into ten divisions.

The PHTX-11 features include a NEMA-4X housing, 

an integral LCD display for continuous pH reading or for 

a direct corresponding readout in milliamps, using a convenient 

push-button switch. The 4 to 20 mA output signal may be 

scaled in the field to meet specific pH ranges in any 1 to 14 pH 

unit increment. Temperature compensation is manual using

a fixed resistor or automatic using any of OMEGA’s 

700 Series thermistors.

Isolated or Non-Isolated Models Available

4 to 20 mA Output

Manual or Automatic Temperature Compensation

Comes complete with operator’s manual.

Ordering Examples: PHTX-11, isolated 4 to 20 mA transmitter, PSS-D12B, power supply,

$430 + 150 = $580.

PHTX-014, non-isolated 2-wire pH transmitter, PSS-D12B power supply, $189 + 150 = $339.

PHTX-11, isolated 

4 to 20 mA transmitter, $430,

shown smaller than actual size. 

Industrial pH Two Wire 4 to 20 mA Transmitters

PHTX-212/PHTX-014 

Starts at 

$

189

To Order (Specify Model Number)

Model No. Price Description

PHTX-212 $189 Non-isolated 2 wire pH transmitter, 2 to 12 pH

PHTX-014 189 Non-Isolated 2-wire pH transmitter, 0 to 14 pH

PHTX-ORP 189 Non-Isolated 2-wire ORP transmitter

PHTX-11 430 Isolated 4 to 20 mA pH transmitter with integral

display, NEMA-4X enclosure

PSS-D12B 150 12 or 24 Vdc power supply

AVAILABLE FOR FAST DELIVERY!

PHTX-014, 

non-isolated 2-wire

transmitter, $189. Shown

smaller than actual size. 

Specifications

Range:

PHTX-014: 0 to 14 pH;

PHTX-212: 2 to 12 pH;

PHTX-ORP: 0 to 2000 mV

PHTX-11: Any 1 to 14 pH units, user

selectable

Accuracy:

PHTX-014, PHTX-212: ±0.02 pH

Operating Temperature:

PHTX-014, PHTX-212:

-25 to 70°C (-13 to 158°F)

PHTX-11: -10 to 60°C (14 to 140°F)

Display Resolution: PHTX-11: 0.01 pH

Input Impedance: > 1013 Ω

Temperature Compensation:

Manual: fixed resistors; 

Automatic: PHTX-014, PHTX-212:

1000 Ω platinum RTD

PHTX-11: OMEGA’s

OL-700 series thermistor

Connector: BNC

Power: 12 to 80 Vdc

(24 Vdc recommended)

Output:

PHTX-014, PHTX-212:

Non-isolated 4 to 20 mA

PHTX-11: isolated 4 to 20 mA

Input to Output Isolation:

PHTX-11: 600 V max

Dimensions:

PHTX-014: 50.8 H x 38.1 W 

x 24.1 mm D (2 x 1.5 x 0.95"); 

PHTX-11: 125 H x 74.2 W x 99.6 mm D 

(4.92 x 2.92 x 3.92") 

Display:

PHTX-11: 31⁄2 digit LCD
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