STX-PA Smart Gas Transmitter

Item #: 081e3dd179dc

Product Summary
  • Completely Self-contained Gas Detection Unit
  • Stand-alone Fixed Monitor
  • Two-relays, High Alarm and Low Alarm
  • Local Digital Display
  • A Fault Relay
  • Built-in Audible alarm / Visual Alarm Indicators
  • 4-20 mA Analog Output
  • Long Life Sensor
  • 24 V DC Operation
  • Anti-corrosive Enclosure: Nema 4X or IP 65

The STX – [ * ] PA Smart Gas Monitor is completely self-contained detection unit suitable for wide range of hazardous gases. The gas detector consists of a sensitive and specific electrochemical gas sensor and combination transmitter with extensive signal output capability. As a result, this fully integrated unit may be used as stand-alone gas monitors as lite-safety surveillance system.

The unit features user-programmable dual level concentration alarms, built-in alarm relays, and 4-20 mA output as a local digital readout and audio and visual alarm indicators. Equally important, it utilizes a renewable type sensor which requires a minimum of maintenance and will last 2 to 5 years under normal operating conditions. The extendable sensor GS – [ * ] DY-C or G5 – [ * ] JLY-C up to 3 meters offers versatile and flexible application which can not be achieved with the conventional configuration.

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Sensor Type DF
Monitoring Configuration
Sampling Method Diffusion
Gases Detected Acetic Acid (CH3COOH)
Ammonia (NH3)
Arsine (AsH3)
Boron Trichloride (BCl3)
Boron Trifluoride (BF3)
Bromine (Br2)
Carbon Monoxide (CO)
Chlorine (Cl2)
Chlorine Dioxide (ClO2)
Chlorine Triflouride (ClF3)
Cyanogen Bromide (CNBr)
Diborane (B2H6)
Dichlorosilane (SiH2Cl2)
Di-Methyl Amine ((CH3)2NH)
Ethyl Alcohol (C2H5OH)
Ethylene Oxide (C2H4O)
Ethylenediamine (C2H4(NH2)2)
Fluorine (F2)
Germane (GeH4)
Hydrazine (N2H4)
Hydrogen (H2)
Hydrogen Bromide (HBr)
Hydrogen Chloride (HCl)
Hydrogen Cyanide (HCN)
Hydrogen Fluoride (HF)
Hydrogen Iodide (HI)
Hydrogen Peroxide (H2O2)
Hydrogen Selenide (H2Se)
Iodine (I2)
Methyl Alcohol (MeOH)
Nitric Acid (HNO3)
Nitric Oxide (NO)
Nitrogen Dioxide (NO2)
Ozone (O3)
Phosgene (COCl2)
Phosphine (Ph3)
Phosphorous Oxychloride (POCl3)
Silane (SiH4)
Styrene (C6H5CH=CH2)
Sulfur Dioxide (SO2)
Sulfur Trioxide (SO3)
Tetramethylsilane (TMS)
Triethylamine ((C2H5)3N)
Tungsten Hexafluoride (WF6)
Indicator Characteristic LCD Display
Istallation Style Wall Mount
Operating Temperature1 0 to +40 ºC
Analog Output DC 4 to 20 mA
Alarm Level A1: 30 % of Full Scale (Adjustable Preset Level)
A2: 100 % of Full Scale (Adjustable Preset Level)
Alarm Relay Contacts A1: SPDT AC 125 V, 0.3 A max
A2: SPDT DC 30 V, 1.0 A max (Resistive Load)
Fault: SPDT (Fail Safe Action)
Accuracy ± 10 % of Full Scale
T90 within 30 s
Power Requirements 3 Wire
24 VDC
2 W
Width2 125 mm
Height3 125 mm
Depth4 75 mm
Weight5 1.0 kg
Enclosure Nema 4X, IP 65
  • Gas Cabinets
  • VMBs (Valve Manifold Boxes)
  • Process Tools
  • Gas Jungle Boxes
  • Ambient Air
  • Breathing Air Zone
  • Tool Exhausts
  • Pump Housings
  • Dry & Wet Scrubbers

1 No Condensing
2 Excluding Cable Fittings.
3 Excluding Cable Fittings.
4 Excluding Cable Fittings.
5 Approx.

STX-PA rev 0505 Manual

List of Detectable Gases

STX-PA for Cabinet with PSU 

STX-PA Monitor for Fan Relay 

STX-PA Monitor Relays with Horn & Strobe

Duct Sensor Cell Mount for Horizontal 8 

Duct Sensor Cell Mount for Horizontal Flat Duct 

STX-PA Connected to 4 in Duct 

Comparison PMS vs Disposable 1 pt 

Remote Digital Display p/n 99091

Cal Cap


Bulk Head Mount