H-Guard-L
The H-Guard-L 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. H-Guard-L duct probe transmitter offers temperature and humidity option. The high accuracy temperature and humidity combined sensor provide a digital interface and outstanding full range linearity. The one or three analogue 0-10V or 4~20mA outputs are selectable by jumpers. Modbus RS485 communication interface is provided. Optional backlit LCD can display all measurements and is usable easily in more applications. H-Guard-L offers simplicity in design and installation with the special demountable and replaceable filter to avoid pollution and influence of measurement.
KEY FEATURES
- Special used to real-time detect CO2 level in air ducts.
- NDIR infrared CO2 sensor inside with Self-Calibration and up to 15 years lifetime
- Humidity and temperature detection optional
- Combined temperature and humidity sensor provide the highest accuracy in full range
- Backlit LCD display option can display CO2 measurement and temperature+ RH measurements
- Providing one or three 0~10VDC or 4~20mA or 0~5VDC analog outputs
- Modbus RS485 communication interface makes usage and test more convenient
- Smart structure and attractive housing provide you a unique operation feeling
- Simple and skillful design and installation with a demountable and replaceable filter to provides dust-proof protection
- Special a 180° rotatable fastness position for the probe can change the direction of air detection.
- All housing and probe are IP54 class
- CE-Approval
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
- 65-9082 : H-Guard-L CO2 transmitter wall mounting with the adown external sensor probe. 1x4-20mA output for CO2. Modbus interface. LCD display, CO2 range: 0-2000ppm, power supply 24VAC/VDC.
- 65-9082-10: H-Guard-L CO2 transmitter wall mounting with the adown external sensor probe. 3x4-20mA output for CO2+T+H. Modbus interface. LCD display, CO2 range: 0-2000ppm, power supply 24VAC/VDC.
- 49-998-01 : Plug pack 240VAC/24Vdc 450mA
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