- Construction materials
- Building materials
- Power plant
Microwave sensor for continuous moisture measurement in dry bulk solids
Sensors for continuous moisture measurement and installation on conveyor belts, screw feeder or hoppers.
Two types of sensor-technology to cover a wide range of applications. Both sensors penetrate the product for most reliable measurements.
Microwave based sensor for high resolution and accuracy.
|Material to measure||Dust, powders or granulates|
|Place to measure||Screw conveyor, belt conveyor, container, slide, dryer, mixer|
|Moisture range||0 to 65% (depending on application)|
|Material temperature||Max. 120°C|
|ATEX rating||Category 1|
|Output||4…20mA, Modbus, Profibus|
|Sensor Technical Data|
|Housing||Stainless steel 1.4571|
|Ex-protection (optional)||Zone 20 (Dust), Zone 0 (Gas)|
|Protection category||IP 67 according to EN 60529|
|Material ambient temperature||0 … +80 °C, optional 120 °C|
|Working pressure||Max. 10 bar|
|Power consumption||0.6 W|
|Response time||0.1 sec|
|Weight||Approx. 1000 g|
|Measuring range||0 … 65 % residual moisture
(depending on material)
|Accuracy||0.1 % absolutely in the calibrated measuring range|
|Connection cable||shielded cable 4-wired, 0.25 mm2|
|Transmitter Technical Data|
|Transmitter (DIN Rail)||Transmitter (field housing)|
|Power supply||24 V DC ±10 %||110 / 230 V AC 50 Hz
(optional 24 V DC)
|Power consumption||20 W / 24 VA|
|Protection type||IP 40 to EN 60 529||IP 65 to EN 60 529/10.91|
|Ambient operating temperature||-10 … +45 °C|
|Dimensions (W x H x D)||23 x 90 x 118 mm||258 x 237 x 174 mm|
|Weight||Approx. 172 g||Approx. 2.5 kg|
|Connection terminals cable
|0.2-2.5 mm2 [AWG 24-14]|
|Current output||1 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω
|3 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω
|Interface||RS 485 (ModBus RTU) / USB|
|Pulse output||Open collector – max. 30 V, 20 mA|
|Relay contact||Max. rated load: 250 V AC
Max. peak current: 6 A
Max. rated load 230 V AC: 250 VA
Max. breaking capacity DC1: 3/110/220 V: 3/0.35/0.2 A
Min. switching load: 500 mW (10 V / 5 mA)
|Data backup||Flash memory|
The M-Sens 2 was developed to offer maximum flexibility during assembly. The following aspects should be taken into account in the positioning of the probe: The measuring field penetrates the densest materials (e. g. sand). With a minimum depth of 120 mm, the probe should always be directed at the material to avoid reflection problems.
Measurement of material moisture on a conveyor belt.
A constant material height is generated by attaching a material skimmer. This offers ideal conditions for an online measurement.
The installation in the lower third of a conveyor screw has the advantage that the material volume that passes over the sensor is almost constant, allowing for an optimal measurement. The movement of the auger flights is hidden.
|Free fall pipe
To be able to measure in free fall pipes or inclined pipes (chutes) with the M-Sens 2, it is possible to gather material in front of the probe in the short term, for the duration the measurement, with a catching mechanism. After the measurement, the flap will open again and allows the gathered material to continue to drop. The measuring process can be permanently repeated in short or long intervals according to requirements.