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Wireless Transmitters

TW-XP Wireless Single Gas Transmitter

TW-XP transmitters by Gastronics, Inc. sense toxic, combustible, and VOC gases in a variety of environments. TW-XP transmitters utilize sensor elements from a variety of industry-leading manufacturers to ensure versatility, quality, and performance.

Sensor elements in TW-XP transmitters offer stability, longevity, response and recovery speed, resistance to fluctuations in temperature and humidity, chemical selectivity, poison resistance, linearity, repeatability, warm-up time, and alertness.

Features and Benefits

  • Durable Stainless Housing
  • Non-Intrusive Calibration
  • Fast Warm-Up Time
  • STEL Alarm Calculation
  • Independent Zero & Span
  • Data Logging & RT Clock
  • Hazardous Locations
  • Independent Dual Sensors
  • Manual Loop/Alarm Test
  • Dual Relay Alarm Outputs
  • Optional 5 Relay Board
  • Dual Aux Analog Inputs
  • Digital Input
  • IRDA Data Download
  • 900 MHz, 2.4 GHz, UHF or UHV Radio Option



  • TW-XP common board featuring various configurations
  • Multiple radio options
  • Auxiliary inputs
  • Accepts slave board to enable up to 5 relays and 24V power supply board



  • All transmitters are housed in an electropolished 316 stainless steel enclosure designed to withstand the harshest environments
  • Housing Certifications:
    • UL/CSA approved for Class 1, Div. 1, Groups A, B, C, D and are rated NEMA-4X
  • Five evenly spaced 3/4″ NPT entry ports allow for a variety of installation configurations


Service & Delivery

  • Gastronics maintains a large inventory of boards, sensors and housings.
  • Replacement sensors generally ship in 1-2 days.
  • In the event of an emergency, packages will be hand-delivered to the FedEx office (which closes at 8:00 PM).