Oldham CTX 300 Fixed Gas Detector


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The CTX 300 fixed gas detector is designed to detect oxygen, toxic and refrigerant gases, and also uses a new sensor for CO2 detection over three different ranges: 0-5000 ppm, 0-5% vol. and 0-100% vol.

The CTX 300 fixed gas detector now carries a full 4 year warranty and is compatible with any existing CTX 300 O2 detectors from the field. The range is from 0 to 30% vol. O2 and the sensor operates from -40° to 50°C continuously allowing new opportunities in low-temperature applications.

Product Description


When hazardous levels of toxic gases or oxygen threaten the safety of an unclassified area, the versitile CTX 300 fixed gas detector can satisfy the most demanding safety requirements.

The CTX 300 fixed gas detector transmits data in record time. With a wide range of sensor options, it has the flexibility to protect many potentially hazardous environments.

Maintaining the unit is easy with pre-calibrated gas sensors and an optional LCD display.


  • Detects O2, CO2, toxic and refrigerant gases to meet a wide range of applications
  • New O2 gas sensor will 4 year warranty and is compatible with any existing CTX 300 O2 detectors from the field
  • 4-20 mA output analog transmitter with optional backlit display
  • Plug-in and pre-calibrated sensors to reduce service costs
  • Available with electrochemical, infrared or semi-conductor sensors for increased versitility 
  • More than 30 different gas sensors are available to detect most toxic gases in the industry
  • Available in an infrared version for CO2
  • EN14624 compliant with regards to R134a monitoring
  • Oxygen detector for commercial or industrial applications in unclassified areas


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Product Downloads

View FileCTX300 Fixed Gas Transmitter Datasheet
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