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141A 0.1-1000 Torr Baratron® Absolute Pressure Switches

Overview
Products
Configuration Options
Features
Accessories
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141a baratron 0.1-1000 torr absolute pressure switch

Overview

The 141A Absolute Pressure Switch offers fast, accurate, and reliable protection for vacuum equipment and processes. Designed for applications where a DC signal output is not required, the 141A has relay outputs that are easily interfaced with alarms, valve actuators, computers, process controllers, and other protection devices.

Fully adjustable set point for flexibility
All-metal, all-welded Inconel® and stainless steel construction for corrosion resistance
Fast response switching - 20 msec

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Products

Compare	Model	Compatibility	rankScore	Full Scale Range	Fitting Type	Relay Mode	Availability	Price
141AA-00001AA Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Standard DPDT Relay $635 3 Weeks	141AA-00001AA Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Standard DPDT Relay	UNIVERSAL	1.0	1 Torr	0.5 in. OD tube	Energizes above set point	3 Weeks	$635
141AA-00001AB Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Fail Safe DPDT Relay $635 3 Weeks	141AA-00001AB Absolute Pressure Switch, 1 Torr, 0.5 in. Tube, Fail Safe DPDT Relay	UNIVERSAL	1.0	1 Torr	0.5 in. OD tube	Energizes below set point	3 Weeks	$635
141AA-00001BA Absolute Pressure Switch, 1 Torr, 8 VCR Female, Standard DPDT Relay $720 3 Weeks	141AA-00001BA Absolute Pressure Switch, 1 Torr, 8 VCR Female, Standard DPDT Relay	UNIVERSAL	1.0	1 Torr	8 VCR female	Energizes above set point	3 Weeks	$720
141AA-00001BB Absolute Pressure Switch, 1 Torr, 8 VCR Female, Fail Safe DPDT Relay $720 3 Weeks	141AA-00001BB Absolute Pressure Switch, 1 Torr, 8 VCR Female, Fail Safe DPDT Relay	UNIVERSAL	1.0	1 Torr	8 VCR female	Energizes below set point	3 Weeks	$720
141AA-00001DA Absolute Pressure Switch, 1 Torr, ISO-KF, Standard DPDT Relay $720 3 Weeks	141AA-00001DA Absolute Pressure Switch, 1 Torr, ISO-KF, Standard DPDT Relay	UNIVERSAL	1.0	1 Torr	NW16 ISO-KF	Energizes above set point	3 Weeks	$720
141AA-00001DB Absolute Pressure Switch, 1 Torr, NW16 ISO-KF, Fail Safe DPDT Relay $720 3 Weeks	141AA-00001DB Absolute Pressure Switch, 1 Torr, NW16 ISO-KF, Fail Safe DPDT Relay	UNIVERSAL	1.0	1 Torr	NW16 ISO-KF	Energizes below set point	3 Weeks	$720
141AA-00010AA Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Standard DPDT Relay $635 3 Weeks	141AA-00010AA Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Standard DPDT Relay	UNIVERSAL	1.0	10 Torr	0.5 in. OD tube	Energizes above set point	3 Weeks	$635
141AA-00010AB Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Fail Safe DPDT Relay $635 3 Weeks	141AA-00010AB Absolute Pressure Switch, 10 Torr, 0.5 in. Tube, Fail Safe DPDT Relay	UNIVERSAL	1.0	10 Torr	0.5 in. OD tube	Energizes below set point	3 Weeks	$635
141AA-00010BA Absolute Pressure Switch, 10 Torr, 8 VCR Female, Standard DPDT Relay $720 3 Weeks	141AA-00010BA Absolute Pressure Switch, 10 Torr, 8 VCR Female, Standard DPDT Relay	UNIVERSAL	1.0	10 Torr	8 VCR female	Energizes above set point	3 Weeks	$720
141AA-00010BB Absolute Pressure Switch, 10 Torr, 8 VCR Female, Fail Safe DPDT Relay $720 3 Weeks	141AA-00010BB Absolute Pressure Switch, 10 Torr, 8 VCR Female, Fail Safe DPDT Relay	UNIVERSAL	1.0	10 Torr	8 VCR female	Energizes below set point	3 Weeks	$720
141AA-00010DA Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Standard DPDT Relay $720 3 Weeks	141AA-00010DA Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Standard DPDT Relay	UNIVERSAL	1.0	10 Torr	NW16 ISO-KF	Energizes above set point	3 Weeks	$720
141AA-00010DB Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Fail Safe DPDT Relay $720 3 Weeks	141AA-00010DB Absolute Pressure Switch, 10 Torr, NW16 ISO-KF, Fail Safe DPDT Relay	UNIVERSAL	1.0	10 Torr	NW16 ISO-KF	Energizes below set point	3 Weeks	$720
141AA-00100AA Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Standard DPDT Relay $635 3 Weeks	141AA-00100AA Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Standard DPDT Relay	UNIVERSAL	1.0	100 Torr	0.5 in. OD tube	Energizes above set point	3 Weeks	$635
141AA-00100AB Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Fail Safe DPDT Relay $635 3 Weeks	141AA-00100AB Absolute Pressure Switch, 100 Torr, 0.5 in. Tube, Fail Safe DPDT Relay	UNIVERSAL	1.0	100 Torr	0.5 in. OD tube	Energizes below set point	3 Weeks	$635
141AA-00100BA Absolute Pressure Switch, 100 Torr, 8 VCR Female, Standard DPDT Relay $720 3 Weeks	141AA-00100BA Absolute Pressure Switch, 100 Torr, 8 VCR Female, Standard DPDT Relay	UNIVERSAL	1.0	100 Torr	8 VCR female	Energizes above set point	3 Weeks	$720
141AA-00100BB Absolute Pressure Switch, 100 Torr, 8 VCR Female, Fail Safe DPDT Relay $720 3 Weeks	141AA-00100BB Absolute Pressure Switch, 100 Torr, 8 VCR Female, Fail Safe DPDT Relay	UNIVERSAL	1.0	100 Torr	8 VCR female	Energizes below set point	3 Weeks	$720
141AA-00100DA Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Standard DPDT Relay $720 3 Weeks	141AA-00100DA Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Standard DPDT Relay	UNIVERSAL	1.0	100 Torr	NW16 ISO-KF	Energizes above set point	3 Weeks	$720
141AA-00100DB Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Fail Safe DPDT Relay $720 3 Weeks	141AA-00100DB Absolute Pressure Switch, 100 Torr, NW16 ISO-KF, Fail Safe DPDT Relay	UNIVERSAL	1.0	100 Torr	NW16 ISO-KF	Energizes below set point	3 Weeks	$720
141AA-01000AA Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Standard DPDT Relay $635 3 Weeks	141AA-01000AA Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Standard DPDT Relay	UNIVERSAL	1.0	1000 Torr	0.5 in. OD tube	Energizes above set point	3 Weeks	$635
141AA-01000AB Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Fail Safe DPDT Relay $635 3 Weeks	141AA-01000AB Absolute Pressure Switch, 1000 Torr, 0.5 in. Tube, Fail Safe DPDT Relay	UNIVERSAL	1.0	1000 Torr	0.5 in. OD tube	Energizes below set point	3 Weeks	$635
141AA-01000BA Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Standard DPDT Relay $720 3 Weeks	141AA-01000BA Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Standard DPDT Relay	UNIVERSAL	1.0	1000 Torr	8 VCR female	Energizes above set point	3 Weeks	$720
141AA-01000BB Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Fail Safe DPDT Relay $720 3 Weeks	141AA-01000BB Absolute Pressure Switch, 1000 Torr, 8 VCR Female, Fail Safe DPDT Relay	UNIVERSAL	1.0	1000 Torr	8 VCR female	Energizes below set point	3 Weeks	$720
141AA-01000DA Absolute Pressure Switch, 1000 Torr, NW16 ISO-KF, Standard DPDT Relay $720 3 Weeks	141AA-01000DA Absolute Pressure Switch, 1000 Torr, NW16 ISO-KF, Standard DPDT Relay	UNIVERSAL	1.0	1000 Torr	NW16 ISO-KF	Energizes above set point	3 Weeks	$720
141AA-01000DB Absolute Pressure Switch, 1000 Torr, NW!6 ISO-KF, Fail Safe DPDT Relay $720 3 Weeks	141AA-01000DB Absolute Pressure Switch, 1000 Torr, NW!6 ISO-KF, Fail Safe DPDT Relay	UNIVERSAL	1.0	1000 Torr	NW16 ISO-KF	Energizes below set point	3 Weeks	$720

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Configuration Options

		Description
		141A Absolute Pressure Switch, 1 - 1000 Torr, Unheated, Relay Output

Show Configuration Options

The following options are available for the 141 Baratron® Vacuum Pressure Switch.

Configuration Option	Option Code
141 Vacuum Pressure Switch	141AA
Full Scale Range
1 Torr	00001
2 Torr	00002
10 Torr	00010
100 Torr	00100
1000 Torr	01000
Fittings
1/2 in. OD Tube	A
Swagelok 8 VCR female	B
Mini-CF, rotatable	C
NW16 ISO-KF	D
Swagelok 8 VCO female	E
Relay Mode
Standard operation (energizes above set point)	A
Fail-safe operation (energizes below set point)	B

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

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.

Features

Accessories

Power Supplies and Displays

Description	Compatibility	Avail.	Price
PR4000BF5V3 Digital Power Supply, Display, 2 Channel, RS485, ±24VDC, 1.0 Amp	UNIVERSAL	3 Weeks	$2,525
PR4000BF2V3 Digital Power Supply, Display, 2 Channel, RS232, ±24VDC, 1.0 Amp	UNIVERSAL	3 Weeks	$2,750
PR4000BF5V2 Digital Power Supply, Display, 2 Channel, RS485, ±15VDC, 1.5 Amp	UNIVERSAL	3 Weeks	$2,525
PR4000BS2V2 Digital Power Supply, Display, 1 Channel, RS232, ±15VDC, 1.5 Amp	UNIVERSAL	3 Weeks	$2,225
PR4000BF2V2 Digital Power Supply, Display, 2 Channel, RS232, ±15VDC, 1.5 Amp	UNIVERSAL	3 Weeks	$2,525
PR4000BS2V3 Digital Power Supply, Display, 1 Channel, RS485, ±24VDC, 1.0 Amp	UNIVERSAL	3 Weeks	$2,475
PDR2000AO Digital Power Supply, Display, 2 Channels, RS232, ±15 VDC, 0.75 Amp	UNIVERSAL	Contact Us	$820
1017474-001 Analog Output Module, 4-20 mA, 2 ft. Cable	UNIVERSAL	3 Weeks	$1,475
1017474-003 Analog Output Module, 4-20 mA, 20 ft. Cable	UNIVERSAL	3 Weeks	$1,650