Compare Model Drawings, CAD & Specs Full Scale Range Fitting Type Relay Mode Availability Price
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Standard DPDT Relay
$635
3 Weeks
1 Torr 0.5 in. OD tube Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Fail Safe DPDT Relay
$635
3 Weeks
1 Torr 0.5 in. OD tube Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, 8 VCR Female, Standard DPDT Relay
$720
3 Weeks
1 Torr 8 VCR female Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, 8 VCR Female, Fail Safe DPDT Relay
$720
3 Weeks
1 Torr 8 VCR female Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, ISO-KF, Standard DPDT Relay
$720
3 Weeks
1 Torr NW16 ISO-KF Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1 Torr, NW16 ISO-KF, Fail Safe DPDT Relay
$720
3 Weeks
1 Torr NW16 ISO-KF Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Standard DPDT Relay
$635
3 Weeks
10 Torr 0.5 in. OD tube Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Fail Safe DPDT Relay
$635
3 Weeks
10 Torr 0.5 in. OD tube Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, 8 VCR Female, Standard DPDT Relay
$720
3 Weeks
10 Torr 8 VCR female Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, 8 VCR Female, Fail Safe DPDT Relay
$720
3 Weeks
10 Torr 8 VCR female Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Standard DPDT Relay
$720
3 Weeks
10 Torr NW16 ISO-KF Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Fail Safe DPDT Relay
$720
3 Weeks
10 Torr NW16 ISO-KF Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Standard DPDT Relay
$635
3 Weeks
100 Torr 0.5 in. OD tube Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Fail Safe DPDT Relay
$635
3 Weeks
100 Torr 0.5 in. OD tube Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, 8 VCR Female, Standard DPDT Relay
$720
3 Weeks
100 Torr 8 VCR female Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, 8 VCR Female, Fail Safe DPDT Relay
$720
3 Weeks
100 Torr 8 VCR female Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Standard DPDT Relay
$720
3 Weeks
100 Torr NW16 ISO-KF Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Fail Safe DPDT Relay
$720
3 Weeks
100 Torr NW16 ISO-KF Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Standard DPDT Relay
$635
3 Weeks
1000 Torr 0.5 in. OD tube Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Fail Safe DPDT Relay
$635
3 Weeks
1000 Torr 0.5 in. OD tube Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Standard DPDT Relay
$720
3 Weeks
1000 Torr 8 VCR female Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Fail Safe DPDT Relay
$720
3 Weeks
1000 Torr 8 VCR female Energizes below set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, NW16 ISO-KF, Standard DPDT Relay
$720
3 Weeks
1000 Torr NW16 ISO-KF Energizes above set point
3 Weeks
141a baratron 0.1-1000 torr absolute pressure switch
Absolute Pressure Switch, 1000 Torr, NW!6 ISO-KF, Fail Safe DPDT Relay
$720
3 Weeks
1000 Torr NW16 ISO-KF Energizes below set point
3 Weeks

Product Options

Description
  141a baratron 0.1-1000 torr absolute pressure switch 141A Absolute Pressure Switch, 1 - 1000 Torr, Unheated, Relay Output

Specifications

  • Type
    Pressure Switch
  • Measurement Type
    Absolute
  • Full Scale Pressure Ranges
    1, 2, 10, 100, 1000 Torr (mmHg) absolute
  • Set Point Range
    0.2% to 100% of Full Scale
  • Sensor Temperature
    Ambient
  • Accuracy
    ±0.5% of Full Scale Range (± temperature coefficients)
  • Zero Temperature Coefficient
    ±0.04% of Full Scale/°C
  • Span Temperature Coefficient
    ±0.06% of set point/°C
  • Operating Temperature Range
    0° to 50°C
  • Response Time
    < 20 msec from 0 to Full Scale
  • Relay Contact Ratings
    DPDT, 2 amps @ 30 VDC or 1 amp @ 120 VAC resistive
  • Internal Volume
    7.0 cc (5K-25K Torr units have an 8.5 cc volume)
  • Overpressure
    120% of Full Scale or 35 psia (1000 mmHg), whichever is larger (1 and 2 Torr Full Scale units have a max. overpressure of 25 psia)
  • Power Requirements
    20 to 30 VDC, 72 mA
  • Compliance
    Compliant to EMC Directive 2014/30/EU

Features

Baratron® Capacitance Manometer Technology

Capacitance manometers are electro-mechanical gauges that can measure both pressure and vacuum. The capacitance gauge translates a pressure-modulated movement in a thin diaphragm into an electrical signal proportional to the pressure. The pressure sensor is the thin diaphragm that is exposed to the pressure or vacuum being measured via the inlet tube. An electrode is mounted in the reference cavity behind the diaphragm. Pressure differences between the process and the reference cavity deflect the diaphragm slightly, changing the distance between it and the electrode. Variations in this distance produce variations in the capacitance between the diaphragm and the electrode creating an electrical signal that is proportional to the pressure change. Since differences in the capacitance signal are produced by physical changes within the manometer and not by changes in the gas properties, pressure measurements by the capacitance manometer are independent of the composition of the gas being measured.

Capacitance manometer sensor schematic showing the internal components

Fully Adjustable Set Point

The high accuracy set point can be adjusted from from 0.2% to 100% of Full Scale for tripping the switches relay. An LED provides visual ''above set point'' indication, and facilitates adjustment of the set point.

Inconel® and Stainless Steel Construction

The dual electrode sensor is an all-metal, all-welded design, thus exposing only corrosion-resistant Inconel® and stainless steel to the process gases.

Absolute Pressure Switching

The 141A and 142A pressure switches are referenced to vacuum for absolute pressure trip point switching. Applications for absolute pressure switches include soft pumping, gas box switching, and safety interlocks.

DPDT Relay

A double pole double throw relay rated at 2 amps @ 30 VDC or 1 amp @ 120 VAC resistive provides the set point switching. The relay is energized when pressure is above set point. Fail-safe operation provides for the relay to be energized when pressure is below set point.

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