AFTF
exterior humidity and temperature sensor active optionally with passive sensor
Application
The AFTF with or without display is a humidity/temperature sensor which measures the relative or absolute humidity and the temperature of the air. It is used in refrigeration, air conditioning and clean room technology, in greenhouses and halls and converts the measured variables humidity and temperature into a standard signal 0-10 V or 4…20mA. The housings are suitable for wall mounting.
Technical Data
| Power supply: | 24V AC/DC ± 10% with output 0-10V 10-26 VDC ± 10% with output 4...20mA |
| Power consumption: | 0-10V type 5mA |
| Sensors: | capacitive humidity sensor, dew resistant, small hysteresis, high long-term stability |
| Sensor protection: | Membrane filter, replaceable |
| Humidity measuring range: | adjustable: relative humidity 0...100% or absolute humidity 0...80g/m³ |
| Humidity deviation: | relative humidity: ± 3% rH, (20...80%); at +20 °C, otherwise ± 6% rH absolute humidity: results from measurement errors of relative humidity and temperature |
| Output humidity: | 0-10 V for U-variant 4...20mA for I-variant (must be connected) otherwise no T output signal) |
| Temperature meas. range: | 0-10V or 4-20mA preset to -20...+80 °C, other measuring ranges adjustable: 0..+50 °C, 0...+80 °C, -35...+35 °C, 50...+50 °C, 0...+50°C passive sensor see data sheets |
| Temperature deviation: | ± 0.4K at 20 °C |
| Temperature output: | 0-10 V or 4...20mA or Ohm value |
| Ambient temperature: | 0...+50°C |
| Humidity: | < 95 % rH, non-condensing air |
| Housing: | ABS/ PC, colour pure white (similar to RAL9010), 4 quick release screws |
| Display (optional): | LCD display |
| Dimensions: | 81 x 55 x 35 mm plus sensor tube 18 x 40mm and PG |
| Electrical connection: | 2-, 3-, or 4-wire (see circuit diagram), 0.14 - 1.5 mm² via screw terminals on circuit board |
| Cable gland: | M 16, with strain relief |
| Process connection: | by means of screws |
| Long-term stability: | ±1 % / 10 years |
| Protection class: | III (according to EN 60 730) |
| Protection type: | IP 63 (according to IEC 529) - housing only |
| Standards: | CE conformity, electromagnetic compatibility according to EN 61 326 +A1+A2, EMV Directive 89/336/EWG |
