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AST-IRT Refrigerant Transmitter

Key Features

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Detect a wide range of refrigerants
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Specific, accurate response
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Eliminates false alarms
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Simple one button calibration
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Three enclosure options available
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RoHS compliant circuit boards

Description
Specifications
Technical Library
Product Codes
Accessories

The rugged, reliable AST-IRT refrigerant transmitter is available with infrared (IR) sensors to detect a wide range of refrigerant gases.

The IR sensor is a reliable method of monitoring for refrigerant gas leaks in environments that have air quality problems. The IR sensor will eliminate many false alarms in environments that contain gasoline, diesel and propane exhaust and fumes from solvents, paints, cleansers, and others.

AST-IRT transmitter output a linear 4 - 20 mA signals that can be sent to a controller or building automation system.

The standard enclosure is a rugged aluminum and an optional watertight ABS fiberglass enclosure for wash down protection and stainless steel enclosure for special applications are available.

Calibration is recommended at 6 month intervals and is a simple one button zero adjustment with no calibration gas required.

APPLICATIONS

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Refrigerated Rooms
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Refrigeration Mechanical Rooms
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Chiller Equipment Rooms
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Food Processing Plants
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Wineries
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Breweries
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Bakeries
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Arenas
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and many more

Gas Types

Refrigerants R12	R12
Refrigerants R22	R22
Refrigerants R114	R114
Refrigerants R123	R123
Refrigerants R134A	R134A
Refrigerants R401A (MP89)	R401A
Refrigerants R401B (MP66)	R401B
Refrigerants R402A (HP80)	R402A
Refrigerants R404A (HP62)	R404A
Refrigerants R407C (9000)	R407C
Refrigerants R408A (FX10)	R408A
Refrigerants R409A (FX56)	R409A
Refrigerants R500	R500
Refrigerants R502	R502
Refrigerants R507A (AZ50)	R507A

Sensors

Mechanical

Enclosure:	Painted aluminum
Weight:	900 g (2.0 lbs)
Size:	12.9" x 4.8" x 2.5" (327 mm x 122 mm x 62 mm)

Optional Enclosure:	Water / dust tight ABS fiberglass or stainless steel

Electrical

Power Requirement:	24 VDC (nominal)
Outputs:	Linear 4 - 20 mA signal
Wiring:	18 gauge shielded; three-conductor
Fuse:	Automatic resetting thermal

Input / Output

User Interface

Environmental

Operating Temperature: Chiller Room Model Freezer Room Model	0°C to 43°C (32°F to 110°F) -40°C to 43°C (-40°F to 110°F)
Humidity:	0 - 90% RH non-condensing

Note: Measurements above are sensor dependent.

Certifications

Drawings

AST-IRT Standard Enclosure - Exterior Drawing

Product Specification

AST-IRT Refrigerant Product Specifications

Sensor Specification

AST-IRT Infrared Refrigerant Transmitters for Chiller Room

Description	Code
Chiller room model, infrared refrigerant (R11) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R11
Chiller room model, infrared refrigerant (R12) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R12
Chiller room model, infrared refrigerant (R22) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R22
Chiller room model, infrared refrigerant (R114) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R114
Chiller room model, infrared refrigerant (R123) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R123
Chiller room model, infrared refrigerant (R134A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R134A
Chiller room model, infrared refrigerant (R401A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R401A
Chiller room model, infrared refrigerant (R401B) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R401B
Chiller room model, infrared refrigerant (R402A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R402A
Chiller room model, infrared refrigerant (R404A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R404A
Chiller room model, infrared refrigerant (R407C) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R407C
Chiller room model, infrared refrigerant (R408A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R408A
Chiller room model, infrared refrigerant (R409A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R409A
Chiller room model, infrared refrigerant (R500) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R500
Chiller room model, infrared refrigerant (R502) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R502
Chiller room model, infrared refrigerant (R507A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-C-R507A

AST-IRT Infrared Refrigerant Transmitters for Freezer Room

Description	Code
Freezer room model, infrared refrigerant (R11) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R11
Freezer room model, infrared refrigerant (R12) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R12
Freezer room model, infrared refrigerant (R22) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R22
Freezer room model, infrared refrigerant (R114) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R114
Freezer room model, infrared refrigerant (R123) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R123
Freezer room model, infrared refrigerant (R134A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R134A
Freezer room model, infrared refrigerant (R401A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R401A
Freezer room model, infrared refrigerant (R401B) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R401B
Freezer room model, infrared refrigerant (R402A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R402A
Freezer room model, infrared refrigerant (R404A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R404A
Freezer room model, infrared refrigerant (R407C) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R407C
Freezer room model, infrared refrigerant (R408A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R408A
Freezer room model, infrared refrigerant (R409A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R409A
Freezer room model, infrared refrigerant (R500) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R500
Freezer room model, infrared refrigerant (R502) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R502
Freezer room model, infrared refrigerant (R507A) sensor (0 - 1,032 ppm range), 4 - 20 mA output, 24 VDC	AST-IRT-F-R507A

Standard Option

Description	Code
Stainless steel enclosure	tbd

Watertight Option

Description	Code
Water / dust tight ABS fiberglass enclosure	W