Material moisture measurement
Moisture sensors for measuring material moisture are of great importance for optimized process control in many industries. Optical methods are becoming increasingly important because they have the advantage of working without contact and having no influence on the measurement object.
Our fiber-optic moisture sensors also offer the advantage that they can be used in areas that are difficult to access and under harsh environmental conditions!
Find out about our specialized sensor systems:
- tri²dent “moist”: for use in practically all industries
- SensoWeb “moist”: especially for use in paper and pulp production
Technical data | tri²dent “Moist” | SensoWeb “Moist” |
---|---|---|
Measuring principle | Near infrared | Near infrared |
Measuring range | 0-100% humidity | 0-100% humidity |
Accuracy | product-dependent | product-dependent |
Resolution | 0,1% | 0,1% |
measuring time | einstellbar | einstellbar |
Measuring distance | Depending on the application, up to 200 mm | Depending on the application, up to 200 mm |
Air purge | - | integrated |
fiber optics | to 5 m | to 15 m |
Ambient temperature | Sensor up to 45 °C, sensor head up to 200 °C | Sensor up to 50 °C, sensor head up to 200 °C |
tension | 24 VDC | 24VDC / 230VAC |
outputs | up to 4 analog (4…20 mA) | up to 4 analog (4…20 mA) |
Class | IP54 | IP65 |
Our measuring principle:
Optical humidity sensors are based on the principle of stimulating water molecules to vibrate using electromagnetic waves and thus absorbing electromagnetic energy at certain wavelengths (absorption bands). This absorption is compared with that at water-independent reference wavelengths and converted to % moisture using suitable models.
Our tri²dent “moist” humidity sensors work according to the same time/same spot principle: The sensor sends out three light signals of different wavelengths, which can be identified and evaluated by the receiver thanks to their special modulation. High-quality lock-in amplifiers prepare the signals in the detector with precise frequency and phase. The LED technology used guarantees a long service life for the light sources. Robust fiber optic technology with hundreds of individual fibers enables long-term use even in industrial environments.
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