Online residual moisture measurement

M-Sens 2

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.

highly resistant to abrasion
integrated temperature reading
flow detection function

Reliable moisture measurement with high resolution

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Moisture ranges 0 … 65 % (depending on material)
Measurement accuracy 0.1 %
Online moisture measurement

ATEX-certified
Recording of surface moisture and capillary moisture

Independent of the material colour
Temperature-resistant up to 120 °C

Cement
Chemistry
Asphalt
Food
Glass
Grain

Lime
Minerals
Steel
Wood
Foundry

Construction materials
Biomass
Recycling
Building materials
Power plant

Technical Specifications
Material to measure	Dust, powders or granulates
Place to measure	Screw conveyor, belt conveyor, container, slide, dryer, mixer
Working principle	Microwave
Moisture range	0 to 65% (depending on application)
Material temperature	Max. 120°C
Temperaure measurement	Not included
Mounting	Flange
ATEX rating	Category 1
Output	4…20mA, Modbus, Profibus

Moisture ranges: 0 – 65 % (depending on material)
Measurement accuracy: 0.1 %

Temperatur resistant: up to 120°
ATEX – certified

Materials: alls types of dust, powder, granulates and other bulk solids
Different mounting positions possible

Sensor Technical Data
Housing	Stainless steel 1.4571
Sensor surface	Ceramic
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 cross-section	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

Flexible positioning
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.

Installation situations

Container
For a simple installation, a standard connection flange is available.

Conveyor belt
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.

Conveyor screw
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.