RH/T Probe for Handheld Meters RHA
• Low cost
• Voltage output signal
• Built-in temperature sensor available
• May be used with H5800 handheld meter or separately
• Compact and convenient in use
• Fast connection
Using thin-film sensor, whose capacitance varies proportionally to medium relative humidity, RHA measures relative humidity of air and non-aggressive gases at normal ambient pressure and converts it into standard voltage signal. Based on the RHT transducer, but with its electronics fitted into a cylindrical body, this probe is especially suitable for fast measurements in combination with handheld humidity measuring devices that feature programmable or scalable input. Furthermore, a platinum temperature sensor may be built in the probe for simultaneous medium temperature measurement.
Through its flexible cable with miniature connector, the RHA probe can be easily connected to a H5800 meter to form a lightweight multifunctional and widely applicable device for handheld relative humidity measurement.
RHA Humidity Probe Technical Specifications
| Input | |
| Humidity | capacitive sensor, 0 - 100 %RH |
| Temperature (option) | Pt100 or Pt1000 (w=1.385) (1) , -10 ~ 50°C |
| - accuracy | class 'B' |
| Output | |
| Output voltage | min. 0...max. 100 mV DC |
| Linearity proportional to | measured value |
| Accuracy | |
| Measurement error | 2.5% from span |
| Non-linearity | within measurement error |
| Temperature drift | 0.1% from span for 1 °C |
| Power supply | |
| Supply voltage | DC from the handheld meter |
| Admissible variations | 20 mVp-p at 50 Hz |
| Operating conditions | |
| Ambient temperature | -10 ~ 50°C |
| Ambient humidity | 0 - 85 %RH, non-condensing |
| Design and materials | |
| Case material | stainless steel |
| Sintered filter (option) | stainless steel, 75 μm |
| Wiring | 1-5 m PVC or silicone cable w/ 4-pin M8 connector type 'C3' |
| Dimensions | ø16x min. 120 mm (w/o cable and filter) |
| Weight | 30 g (w/o cable and filter) |
| Protection class | IP54 (except sensor) |
RHA Humidity Probe Ordering Code RHA - G8 - #1.#2
| Code | Feature or option | Code values |
| G8 | Cable length 'k' [m] and type | 1PV…5PV - PVC, 1SL…5SL - silicone |
| #1 | Built-in temperature sensor | X - none, D - Pt100, G - Pt1000 |
| #2 | Sintered filter | X - none, S - sintered filter mounted |
