- New
- Sale
- Temperature
- Humidity
- Pressure
- Light Intensity & Motion
- Air Quality
- Flow
- Modbus | Wireless Modbus
- Room controller
- EtherCAT P
- Accessory
Description
DIN rail airflow transmitter
RHEASREG® KHSSF/ KHSSW
Electronic duct top-hat rail airflow sensor RHEASGARD® KHSSF with active/ switching output, housing for installation in
distributor boxes or control cabinets with 35 mm mounting rail, external flow probe incl. mounting flange, for determining
the flow velocity (0.1…20 m/s). The measuring transducer automatically detects the required output type and converts the
measurands into the required standard signal of 0–10 V or 4…20 mA (Automatic Output Switching/ AOS).
Electronic duct top-hat rail airflow monitor RHEASREG® KHSSW with switching output, housing for installation in distributor
boxes or control cabinets with 35 mm mounting rail, external flow probe incl. mounting flange, for determining the flow velocity
(0.1…20 m/s).
The flow sensors/ flow monitors are suitable for monitoring or controlling airflows in ducts, at fans and dampers,
for flow-dependent monitoring of humidifiers and electric heating registers according to DIN 57100, Sect. 420,
or for use in connection with DDC systems.
Technical details
LED operating status indicator
| Yellow LED | off: | switching point not reached (contact 5-6 open) |
| on: | switching point reached (contact 5-6 closed) | |
| flashing: | start-up override is active | |
| Green LED | on: | Unit is ready for operation |
| flashing: | error in sensor or sensor line |
Voltage supply
24 V AC/ DC (± 10 %) (KHSSW-W24, KHSSF-W)
230 V AC (± 10 %), 50 Hz (KHSSW-W230)
230 V AC (± 10 %), 50 Hz (KHSSW-W230)
Switchpoint
1...20 m/s, threshold can be adjusted via potentiometer
Data points
flow velocity
Start bridging
60 s (changeover contact switched or 10 V / 20 mA at output,
after applying the supply voltage)
Warm up time
< 2 min
Response time
< 60 s
Sensor
calorimetric, temperature compensated, sensor breakage protection
Output
| KHSSF-W | 0–10 V/ 4…20 mA (via Automatic Output Switching – the unit recognises the required output type and automatically switches to U or I output); 24 V changeover contact (max. 5 A, cos = 1), a switching hysteresis of 2 % final value, threshold can be adjusted via potentiometer |
| KHSSW-W24 | 24 V changeover contact (max. 5 A, cos = 1), a switching hysteresis of 2 % final value, threshold can be adjusted via potentiometer |
| KHSSW-W230 | 230 V AC changeover contact (max. 10 A, cos = 1), a switching hysteresis of 2 % final value, threshold can be adjusted via potentiometer |
Reproducibility
± 1.0 % of final value
Current consumption
approx. 3 VA
Measuring range
0,1...20 m/s
Max. temperature of medium
0…+70 °C
Ambient temperature
Storage –20...+50 °C; Operation 0...+60 °C
Switching hysteresis
2.0 % of final value
Process connection
by means of mounting flange with seal
(included in the scope of delivery)
Protective tube
Polyamide (PA6) material, white colour (blue sensor holder), with torsion protection,
Ø 12 mm, EL = approx. 20–155 mm, vmax = 30 m/s (air)
Electrical connection
0.14 - 2.5 mm²
via terminal screws
via terminal screws
Housing
PC / ABS (UL94-V0) material, light grey colour,
36 mm (2TE) wide for 35 mm mounting rail,
approx. 90 x 36 x 58 mm (H x W x D)
Screwed socket
-
sensor cable
PVC LiYY, 3-wire, KL = approx. 2.4 m
Long-term stability
± 0.5 % of final value per year
Permissible air humidity
< 98% RH, pollutant-free, non-precipitating air
Humidity
< 98 % RH, non-precipitating air free of harmful substances
Protection class
II (according to EN 60 730) with UB = 230 V (KHSSW-W230)
III (according to EN 60 730) with UB = 24 V (KHSSW-W24, KHSSF-W)
III (according to EN 60 730) with UB = 24 V (KHSSW-W24, KHSSF-W)
Protection type
IP 30, Sensors IP 20
Protection type (sensor)
IP 20 (according to EN 60 529)
Protection type housing
IP 30 (according to EN 60 529)
Standards
CE conformity,
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3