aSENSE™-Duct
aSENSE Duct is an infrared and maintenance-free carbon dioxide transmitter for installation in the ventilation duct. The unit has an industrial housing (protection class IP65) with duct probe.
Key benefits
-Maintenance-free in normal applications.
-Contributes to lower energy costs when it is applied in a Demand Control Ventilation (DCV) strategy.
-Internal automatic self diagnostics.
-2 analogue outputs as standard (V/mA). Relay output as option.
-Cost-efficient RS485 communication as option.
-Internal 2-channel logger as option.
Applications
aSENSE Duct is an infrared and maintenance-free carbon dioxide transmitter for installation in the ventilation duct. The unit has an industrial housing (protection class IP65) with duct probe. The product is designed to control ventilation by transmitting the measured carbon dioxide and temperature value to the system´s Master or DDC. The transmitter is flexible and suits many different ventilation strategies. According to most building regulations, the fresh air flow should, in rooms where people stay more than occasionally, be at least 7 litres/sec and person.
If the room occupants are adults with a light work-load and the outdoor CO2 concentration is 350 ppm, this airflow answers directly to an in-door CO2 concentration of 1040 ppm.
According to National Boards of Occupational Safety and Health, the CO2 concentration can therefore be used as an indicator of the Indoor Air Quality (IAQ). A CO2 concentration below 1000 ppm should then always be the aim.
Specifications
| Standard Specification | |
| Operating Principle | Non-dispersive infrared (NDIR) |
| Measured gas | CO2 |
| Measurement range CO2 | 0 - 2000 ppm |
| Accuracy | ± 1% of measurement range ± 5 % of measured value |
| Dimensions | 142 mm x 84 mm x 46 mm， probe 245mm |
| Maintenance | Maintenance-free* |
| Life Expectancy | > 15 years |
| Operation temperature range | 0 to +50 °C |
| Operation humidity range | 0 to 95% RH (non-condensing) |
| Power supply | 24 VAC/VDC±20%, 50-60 Hz (half-wave rectifier input) |
| Power Consumtion | < 3 Watts average |
| Response timeT90 | 2 min. diffusion time |
| Warm-up time | ≤ 1 min. (@ full specs ≤ 10 minutes) |
| Communication | Uart ( Modbus) |
| Outputs | |
| OUT 1 linear output | 0/2 to 10 V DC or 0/4-20mA (CO2) |
| OUT 2 linear output | 0/2 to 10 V DC or 0/4-20mA (°C) |
*Maintenance-free with using SenseAir ABC logic Self calibration using for normal indoor applications.
Art.no.
| Art.no. | Product | Additional features |
| 040-8-0019 | aSENSE Duct | No Display |
| 040-8-0031 | aSENSE Duct - Disp | Display |
