SINCE 1996

+38 (044) 494 33 55

YouTube Page on Facebook

Office hours:
Mon-Fri: 09:00 - 18:00
Lunch break: 13:00 - 14:00





Microwave moisture meters

M-Sens 2 - Online humidity measurement

M-Sens 2 - Online humidity measurement

M-Sens 2 Online humidity measurement

 The microwave sensor for continuous humidity measurement in dry bulk solids

 Simple retrofitting for measurement in container outlets, conveyor screws, on conveyor belts, slides etc.

- Humidity ranges 0 ... 65 % (depending on material)
- Measurement accuracy 0.1 %
- Online humidity measurement
- Independent of the material flow
- Temperature-resistant up to 120 °C
- ATEX-certified
- Recording of surface humidity and capillary humidity


The M-Sens 2 is used for the continuous measurement of humidity on solids of all kinds. The M-Sens 2 sensor can ideally be used, for example in container outlets, conveyor belts, conveyor screws, mixers and conveyor dryers. It is important that the measuring surface of the sensor is always covered with material. The M-Sens 2 is a contact-measuring procedure. The ceramic disc (measuring surface) must always be covered with material.


The M-Sens 2-sensor works with precise high-frequency measurements and direct digitalisation of the measurement values and thus a high resolution. Since the surface and capillary humidity of a material has a strong influence on its dielectric constant, the humidity can be determined exactly given a constant medium bulk density. By way of support, any fluctuations of the measuring value caused by the bulk density are balanced through an internal filter function. Temperature-related fluctuations of the measuring value are automatically compensated by the sensor. The calibration of the system can easily be carried out by the operator. On the installed system, the calibration is a matter of pushing a button and entering the humidity reference value.

Mounting and installation

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 

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.

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.

Specifications Tech. doc. Examples of applications Pictures / Videos

Technical data



Stainless steel 1.4571


Sensor surface



Protection category

IP 67 according to EN 60529


Ex-protection (optional)

Zone 20 (dust), zone 0 (gas)


Material ambient temperature

0 ... + 120 °C


Working pressure

max. 10 bar


Power consumption

0.6 W



approx. 1.0 kg


Response time

0.1 seconds


Measuring range

0... 65 % residual moisture (depending on material)



0.1 % absolutely in the calibrated measuring range


Connecting cable

shielded cable 4-wired, 0.25 mm²





Power supply

110/230 V AC (50 Hz) 24 V DC


Power consumption

20 W / 24 V


Current consumption

max. 1 A at 24 V


Protection category

IP 65 according to EN 60529/10.91


Operating temperature

- 10... + 45 °C



258 x 237 x 174 mm (W x H x D)



approx. 2.5 kg



RS 232, RS 485


Cable glands

3x M16 (4.5-10 mm Ø)


Cable cross section

0.2 - 2.5 mm² [AWG 24-14]


Current output signal

1 x 4 ... 20 mA (0 ... 20 mA), load < 500 Ohm


Switched output measuring alarm

Relay with two-way contact max. 250 V AC, 1 A


Digital inputs

2 inputs for active external control signals


Data protection





Версия для печати  

Contact manager

Mr. Serhiy Shmid

Preliminary inquiry

CSC-Automation Company presentation

Overview catalogs

Measurement in the technological process. Catalogue on Harrer & Kassen products

Automation of grain dryers

Equipment for grain storage. Overview catalogue

Automation components for production of vegetable oil. Overview catalogue.

IDEM catalog of equipment. Price-lists 2017

Overview catalogues

New products