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H-Guard

H Guard

The H-Guard is a CO2 transmitter series designed to be installed in HVAC applications. The CO2 sensing element uses the Non-Dispersive Infrared Technology (NDIR) with the patented self-calibration system to guarantee the long term stability and up to 15 years life time. 
 

 

 

KEY FEATURES

  • Real-time detecting CO2 level.
  • NDIR infrared CO2 module inside with four CO2 detection range selectable.
  • CO2 sensor has Self-Calibration Algorithm and 15 years lifetime
  • Wall-mounting
  • Providing one analog output with voltage or current selectable
  • 0~10VDC/4~20mA selectable easily via jumpers
  • Provide a special model with a on/off relay output with a touch button to operate a fan control.
  • Design for HVAC, ventilation systems, offices, or other public places.
  • Modbus RS485 communication interface optional: 15KV antistatic protection, independent address setting
  • CE-Approval

H-Guard Mounting Diagram

SPECIFICATIONS

Gas detected Carbon Dioxide (CO2)
Sensing element Non-Dispersive Infrared Detector (NDIR)
Accuracy @25(77),2000ppm ±40ppm + 3% reading
Stability <2% of FS over life of sensor (15 yr typical)
Calibration interval  ABC Logic Self Calibration System
Response time <2 minutes for 90% step change
Warm up time 2 hours (first time) 2 minutes (operation)
CO2 measuring range 0-2,000ppm / 0-5,000ppm selectable in orders
0-20,000ppm / 0-50,000ppm just for TSM-CO2-S series
Sensor life Up to 15 years
Power supply 24VAC/24VDC
Consumption 1.5 W max. ; 0.8 W avg.
Analog outputs 0~10VAC or 4~20mA selectable by jumpers
Relay output 1X3A switch load
Four set points selectable by jumpers
Modbus interface Modbus RS485 interface
9600/14400/19200(default)/28800 or 38400bps (programmable 
selection), 15KV antistatic protection.
Operation conditions 0~50(32~122); 0~95%RH, non condensing
Storage conditions -40~70(-40~158)
Net weight 180g
Dimension 100mm×80mm×28mm
Installation standard 65mm×65mm or 2”×4”wire box
Approval CE-Approval

 

ORDERING INFORMATION

  • 65-9080    : H-Guard CO2 Transmitter, 1x4-20mA output 1 x Relay output0-2000ppm standard range
  • 49-998-01 : Plug pack 240VAC/24Vdc 450mA

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