WSERD-134.446
Electronic air flow monitor for wall mounting.
The WSERD air flow monitor is suitable for monitoring fans, control dampers, humidifiers and electric heating registers in accordance with DIN 57100, Part 420 and for use with DDC systems. The air flow monitor works according to the calorimetric principle. The heat extraction by the air flow is measured and converted into the switching value. The sensor contains a heating element and two temperature sensors. A microcontroller controls the heating and measures the temperature differences. It calculates the air flow velocity from the stored calibration curves and transmits the value serially to the control unit. Here, another microcontroller determines the switching behavior of the two relays from the default values of the setting controllers. Installation is carried out with suitable screws (not included in the scope of delivery) on a level surface and is position-independent.
Art.-Nr.: G8000428
Technical data
| Adjustable tripping value for flow with fluids | 0.2 … 10 m/s |
| Ambient temp. for evaluation electronics from | 0 °C |
| Ambient temperature for evaluation electronics | 0 … 50 °C |
| Bearing temperature | –10 … 75 °C |
| Can be read off | No |
| Degree of contamination | 2 |
| Dimensions (W x H x D) | 136 mm x 110 mm x 69 mm |
| Electric connection | screw terminals |
| Housing material | plastic |
| Included with probe | Yes |
| Length of sensor | 165 mm |
| Max. Sensor temperature | 90 °C |
| Max. switching current | 8 A |
| Max. switching voltage | 230 VAC, 50 Hz |
| Medium | Air |
| Medium temperature | −20 … 90 °C |
| Min. sensor temperature | -20 K |
| Number of switching stages | 10 |
| Operating voltage | 230 VAC, 50 Hz / 24 VAC, 50 Hz / 24 VDC |
| Potential free switching contact | Yes |
| Probe integrated in the device | No |
| Protection class | II, following appropriate mounting |
| Rated impulse voltage | 4000 V |
| Sensor element | hot film anemometer |
| Switching contact | 2 two-way contacts |
| Switching difference, can be adjusted | Yes |
| Transistor output | 15…120 s |
| Wire break or measurement circuit monitoring | 20 s |
| With display | No |
| With explosion protection | No |
Kontaktanfrage
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