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122 Series Mechanical Pressure Switches & Transmitters

Versatile, local or remote indication of system pressure for high-purity applications.
Models IPS122 / IPT122


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122 Series Data Sheet


Indicating Pressure Switches Model IPS122 2"

  • 2-inch stainless steel solid-state switch with local and remote alarm capability
  • Electronic switch with an adjustable pressure switch set point to operate lights or relays up to 12 watts
  • Logic outputs: Off-on and Type 1 (0 to 9-30 Vdc), Type 2 (8 to 30 Vdc) and Type 3 (0 to 5 Vdc)
  • Available in a variety of process connections, pressure ranges and socket orientations

Indicating Pressure Transmitters Model IPT122 2"

  • 2-inch stainless steel transmitter
  • Pressure ranges: Up to 4000 psi
  • Accuracy: 1% of full scale
  • Industry standard output: 4 to 20 mA, 0 to 5 Vdc, 1 to 5 Vdc


  • 316L stainless steel construction withstands harsh environments
  • Available in a variety of process connections, pressure ranges and socket orientations to fit application needs
  • Powered models support electric standard outputs for convenient connection


Gas delivery systems and tools used for semiconductor processing, including:

  • Bulk gas
  • Gas cabinets
  • Gas distribution
  • Solar panels
  • Processes: Food and beverage, pharmaceutical, water treatment and bulk gas
Product Type

Mechanical Pressure Switches

Mechanical Pressure Transmitters


Ultra-High Purity

High Accuracy

Pressure Range

Vacuum to 4,000 psi (276 bar) & metric

1% Full Scale
Response Time
Less than 200 milliseconds
Helium Leak Check
4 x 10-9 inboard std. cc/sec
Cleaned for oxygen service to ANSI B40.1 level IV specifications
Temperature Range
0° to 160°F (-18° to 71°C)
Temperature - Compensating
20° to 135°F (-7 to 57°C)
Temperature - Storage
-20° to 175°F (-29° to 79°C)
300 Series Stainless Steel, electropolished
Bezel & Lens Material
One-piece polycarbonate, screw-on
Socket Material
316L Stainless Steel
300 Series Stainless Steel
Bourdon Tube
316L Stainless Steel
Proof Pressure
Burst Pressure
Process Connections
Face-seal male, face-seal swivel male, face-seal swivel female and 1/4” NPT male
White with black marking; “Use No Oil” is red.
Power Requirements

Off-On Switch Type 1
12 Watts or 500 mA; 175 mA max. for intrinsically safe applications

Logic Output 8 to 30Vdc Type 2
60 mA (sink) Open collector NPN

Logic Output 5 Vdc Type 3
60 mA (sink) Open collector NPN

Input / Output



Off-On Switch Type 1: 9 to 30 Vdc
Logic Output 8 to 30 Vdc Type 2: 9 to 30 Vdc
Logic Output 5 Vdc Type 3: 4.8 to 5.2 Vdc


Off-On Switch Type 1: 0 to 9-30 Vdc; 30 mA (off), 45 mA (on)
Logic Output 8 to 30 Vdc Type 2:  0 to 9-30 Vdc; 30 mA (off), 45 mA (on)
Logic Output 5 Vdc Type 3: 0 to 5 Vdc; 3 mA (off), 11 mA (on)
Switch Leads: 2 m (6’) cable, tinned ends, 0.23” in diameter
Switch Differential: 3% of scale: 0.25% of scale repeatability
Trip Position: External adjust. Select to trip on ascending (N.O.) or descending (N.C.) pressure. (Field changeable by internal jumper.)



Voltage In: 11.5 to 30 Vdc (12 Vdc recommended)
Voltage Stability: Filtered power supply with noise <2mV RMS, ripple < 6 mV P-P
Operating Current: 40 mA maximum short circuit to ground, 8 mA continuous load, 10 mA maximum intermittent


Type 1: 0 to 5 Vdc
Type 2: 1 to 5 Vdc
Type 3: 1 to 5 Vdc ground referenced
Type 4: 4 to 20 mA sinking
Type 5: 0-5 Vdc or 1-5 Vdc, or 4-20 mA current sink
Type 6: 1-5 Vdc ground reference, 4-20 mA sinking
Type 8: 4-20 mA sourcing, 3-pin Molex connector with 10’ cable
Type 9: 4-20 mA sourcing, 6’ cab/w with tinned ends
Output Current: 40 mA max. short circuit to ground, 10 mA continuous load
Transmitter Leads: 2 m (6’) cable, tinned ends, 0.23” in diameter

IPS122 IPT122
Product Type 2 Inch Pressure Switch 2 Inch Pressure Transmitter
Differentiator Stainless Steel Stainless Steel
Socket Orientation Stem Mounted Stem Mounted
Pressure Range Vacuum - 4,000 psi Vacuum - 4,000 psi
Accuracy 0.25% Full Scale (BFSL) 1% FS
Output Type Analog Voltage or Current Single Switch - Two Types
Filename File Type Documents By Language
Data Sheet pdf English
Installation & Operation Manual - IPS122 pdf English
Installation & Operation Manual - IPT122 pdf English
CE EU Declaration of Conformity Certificate pdf English Romanian Russian Spanish

Use the following guide (model code information from data sheet) to translate the CAD configurations available below. If you need assistance or can’t find what you’re looking for, please contact Applications Engineering or your local Brooks Instrument representative.

Example: IPS122 - PSI_BAR - VSM - 1 - D


Pressure Connection

  Switch Type
Trip Position
  Pounds per Square Inch and Bar
 Face seal swivel male
  Type 1
 Descending (normally closed)