Omega Products PHTX-014 User Manual

Industrial pH Two Wire 4 to 20 mA Transmitters

PHTX-212/PHTX-014

U Isolated or Non-Isolated Models Available
U 4 to 20 mA Output
U Manual or Automatic Temperature Compensation

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-ORP is for an ORP electrode input with a range of
0 to 2000 mV.

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.

PHTX-014,
non-isolated 2-wire
transmitter, 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 output
Accuracy:
PHTX-014, PHTX-212, PHTX-11: ±0.02 pH
PHTX-ORP: ±1.0 mV
Operating Temperature:
PHTX-014, PHTX-212, PHTX-ORP: -25 to 70°C (-13 to 158°F)
PHTX-11: -10 to 60°C (14 to 140°F)

Input Impedance: > 10
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, PHTX-ORP: 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-212, PHTX-ORP: 57.4 H x 38.1 W x 38.1 mm D
(2.25 x 1.5 x 1.5")
PHTX-11: 125 H x 74.2 W x 99.6 mm D (4.92 x 2.92 x 3.92")
Display:
PHTX-11: 3
Display Resolution:
PHTX-11: 0.01 pH

1

⁄2 digit LCD

13

Ω

PHTX-11, isolated
4 to 20 mA transmitter,
shown smaller than actual size.

To Order Visit omega.com/phtx014 for Pricing and Details

Model No. Description

PHTX-212 Non-isolated 2 wire pH transmitter, 2 to 12 pH
PHTX-014 Non-Isolated 2-wire pH transmitter, 0 to 14 pH
PHTX-ORP Non-Isolated 2-wire ORP transmitter
PHTX-11 Isolated 4 to 20 mA pH transmitter with integral

PSS-D12B 12 or 24 Vdc power supply

Comes complete with operator’s manual.

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

PHTX-014, non-isolated 2-wire pH transmitter, PSS-D12B power supply.

display, NEMA-4X enclosure

D-29

Our Industrial pH Instrumentation and Electrodes product
line continues to expand, visit omega.com for new details!

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& Service

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