Gas Detectors

United Electric Vanguard - Intrinsically Safe WirelessHART Gas Detector


The Vanguard WirelessHART gas detector is ideal for the monitoring of toxic and combustible gases without the need for costly and fixed wiring. With a five year battery life and one button calibration, the Vanguard detector is easy to operate and maintain.

Each Vanguard detector has a WirelessHART transceiver, an antenna, a display, a long life power module, a gas sensor, and a signal processor for the gas sensor. Vanguard uses a sensor architecture trademarked “Flexsense,” which allows the sensor to identify its target gas and self-configure to a Vanguard transmitter upon connection.

It is currently available with either a non-dispersive infrared (NDIR) methane sensor (0-100 %LEL), an electrochemical hydrogen sulphide sensor (0-100 ppm), an electrochemical carbon monoxide sensor (0-500 ppm) or an electrochemical ammonia sensor (0-100ppm).

Wireless gas detectors like the Vanguard can augment existing gas detection coverage with minimal financial and labor outlay. The Vanguard can be plugged-and-played anywhere in an existing WirelessHART® mesh and perform its role as a first line of defence for H2S monitoring.


  • Wireless capability
  • Field interchangeable toxic and combustible gas sensors
  • Interoperable with existing WirelessHART® networks and asset management systems (AMS)
  • Easy calibration and operation
  • 5+ year battery life
  • Heavy duty design with Class 1, Div 1 & 2 hazardous location approvals


  • Operating Temperature: -40°F to 149°F (-40°C to 65°C)
  • Supported Gases: Methane (CH₄) ; Hydrogen Sulfide (H₂S)
  • Resolution: 1%LEL or 1ppm
  • Accuracy: CH4 sensor – ±2% LEL or +5% of indication, whichever is greater ; H2S sensor – ±2 ppm or +5% of indication, whichever is greater ; carbon monoxide sensor – ±5 ppm or ±5% of indication, whichever is greater ; ammonia sensor – ±2 ppm or ±5% of indication, whichever is greater.
  • Enclosure: Type 4X, IP66
  • Weight: 9.6 lbs (including sensor and battery)
United Electric Vanguard
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