Werne & Thiel Online Moisture Sensors, OLAS Density Analyzers & Processing Units

High-frequency HPR online moisture probes (FS1, FSV, FSM, FSA, FSH), FMP-2 two-channel processors, patented OLAS optical light absorption sensors, and PMB laboratory moisture analyzers by Werne & Thiel sensortechnic.

FSV Series Universal Flange Moisture Probes

Adjustable flange probe FSV (The Universal) designed for universal installation in hoppers and on conveyor belt gliders. High-frequency HPR sensing tracks moisture in sand, gravel, and biomass. Units accept synthetic, rubber, or ceramic wear covers.

Series design: FSV adjustable flange probe for thick vessel walls and belt gliders
Target media: concrete sand, aggregates, mineral powders, grain, and wood chips
Electrical specs: 0–10 V or 0/4–20 mA analog output with 9–30 V DC power input
Replaceable parts: synthetic standard face, special rubber, and ceramic wear plates

FS1 Series Classic Disc Moisture Sensors

Classic disc sensor FS1 features a fixed mounting flange with three mounting holes and selectable wear protection. Built-in electronics output direct 0–10 V or 0/4–20 mA signals. Replaceable covers include special ceramic, wear rubber, and Teflon.

Model layout: FS1 traditional disc probe with fixed three-hole mounting flange
Applications: aggregate weigh hoppers, dosing chutes, food and chemical bulk lines
Signal output: direct 0–10 V or 0/4–20 mA output with integrated calibration unit
Spare assemblies: replaceable special ceramic discs, wear rubber, and Teflon covers

FSM Series Heavy-Duty Mixer Moisture Probes

Mixer probe FSM (The Tough) installs directly inside pan and planetary mixers under heavy abrasion. It combines an 8 mm replaceable steel protection sleeve with a 10 mm ceramic outer cover. A weldable mounting ring with side bolts sets probe depth.

Probe series: FSM heavy-duty sensor engineered for pan and planetary mixers
Process tasks: tracking dry mix and wet mix homogeneity and water batching curves
Armor specs: 8 mm replaceable outer steel tubing and 10 mm ceramic sensing plate
Service parts: hardened 8 mm sleeves, 10 mm ceramic covers, weldable mounting rings

FSH Series High-Temperature Moisture Sensors

High-temperature sensor FSH (The Unrivaled) measures moisture in hot bulk media up to 190 °C at up to 80 °C ambient temperature. Its IP68 body integrates digital linearization with 0–10 V or 4–20 mA output. Replaceable covers use ceramic or Teflon.

Sensor model: FSH high-temperature probe with internal digital linearization
Thermal rating: medium temperature up to 190 °C, ambient temperature max 80 °C
Protection & power: IP68 enclosure, 9–30 V DC supply, 0–10 V or 0/4–20 mA output
Replaceable wear parts: high-temp special ceramic plates and Teflon PTFE covers

FSA Series Long Arm Silo Moisture Sensors

Arm sensor FSA (The Long) in 20 cm, 50 cm, and 100 cm lengths installs inside silos above discharge gates. Internal placement keeps material pressure constant and self-cleaning across the probe. Potted IP68 electronics calibrate via a terminal box.

Configuration: FSA arm probe in 20 cm, 50 cm, and 100 cm lengths with angled flange
Bulk media: silica and foundry sand, grain, animal feed, sugar, coffee, and ceramics
Technical data: potted IP68 stainless housing, 0–10 V or 0/4–20 mA, 9–30 V DC
Spare parts: 3 mm special ceramic cover, wear rubber, Teflon face, terminal boxes

FMP-2 Two-Channel Moisture Processing Units

Two-channel processing unit FMP-2 connects two independent moisture probes and two PT100 temperature sensors. Its graphic LCD touchscreen stores five 40-point calibration curves per channel. Pluggable terminals, USB, and isolated RS485 link to plant PLCs.

Unit model: FMP-2 two-channel processor with high-resolution graphic touchscreen
Sensor inputs: 2 independent moisture sensor channels plus 2 PT100 thermal inputs
Data & memory: 5 calibration curves per channel (40 points), USB and isolated RS485
Replacement parts: pluggable backplane clamping bars, display modules, power boards

OLAS Optical Light Absorption & Density Sensors

Patented Optical Light Absorption Sensor (OLAS) projects light into flowing media to measure composition, turbidity, and solids density. It monitors concrete residual water, cement slurry, and pulp in real time. Inline fittings support water recycling.

System type: patented OLAS optical light absorption and density measuring system
Applications: concrete recycling water density, cement slurry, pulp, foil thickness
Measurement method: inline optical light transmission and absorption evaluation
Component parts: optical sensor heads, pipeline mounting fittings, evaluation units

PMB Series Halogen Laboratory Moisture Analyzers

Laboratory moisture analyzers PMB 53, PMB 163, and PMB 202 combine precision weighing with halogen heating in 1 °C steps. They test moisture in cement, aggregates, food, and chemicals without external software. Dual USB and RS-232 ports export logs.

Analyzer models: PMB 53 (50 g capacity, 0.001 g readability), PMB 163, and PMB 202
Sample types: cement, aggregates, chemical powders, oils, creams, and grain samples
Heating & I/O: halogen bulb heating in 1 °C steps, USB host/device and RS-232 ports
Consumables & parts: replacement halogen heating bulbs, sample pans, chamber shields

High-Frequency Dielectric HPR Principle in Werne & Thiel Online Moisture Probes

Werne & Thiel industrial moisture probes operate on the proprietary High Frequency Dielectric Polarisation and Field Refraction (HPR) measurement principle.

An integrated high-frequency oscillator projects an electromagnetic sensing field into the material layer passing across the probe face and evaluates the dielectric permittivity contrast between water molecules and dry solid particles.

High-frequency field refraction suppresses measurement drift caused by ionic conductivity variations from dissolved salts or mineral additives in concrete sand, aggregates, and biomass.

Internal conditioning electronics output a linearized 0–10 V or 0/4–20 mA analog signal directly to plant batching controllers.

Mechanical Probe Selection Across FS1, FSV, FSM, FSA, and FSH Sensor Families

Each sensor series addresses distinct mounting geometries and mechanical load profiles in bulk handling plants. The FS1 classic disc probe features a fixed three-hole flange for flush mounting in weigh hoppers and dosing chutes.

The FSV universal probe incorporates an adjustable clamping flange to accommodate thick bunker walls or sliding belt glider brackets over conveyors.

For deep storage vessels, the FSA arm sensor extends 20 cm, 50 cm, or 100 cm directly into the silo stream above discharge gates where material head pressure remains uniform.

For planetary and pan concrete mixers, the FSM probe combines an 8 mm replaceable steel sleeve with a 10 mm ceramic sensing face.

Wear Protection Materials for Abrasive Aggregates, Impact Zones, and Hot Media up to 190 °C

Selecting the correct replaceable sensing cover protects the high-frequency resonator from premature mechanical wear and material buildup. Standard synthetic covers provide low-friction sliding for non-abrasive powders, grains, and light pellets.

In quartz sand, crushed gravel, and foundry sand lines, high-density special ceramic plates (up to 10 mm thick on FSM probes and 3 mm on FSA probes) resist severe sliding abrasion.

Impact-resistant special rubber absorbs kinetic energy from coarse falling stones, while food-grade PTFE Teflon prevents sticking in cohesive pastes and withstands process medium temperatures up to 190 °C on FSH high-temperature sensors.

Two-Channel Signal Processing and Temperature Compensation with FMP-2 Units

The second-generation FMP-2 moisture processing and display unit evaluates signals from up to two independent moisture probes along with two external or integrated PT100 temperature sensors.

Each channel stores five selectable calibration curves with up to 40 linearization points, enabling operators to switch material profiles across different aggregate grades or grain varieties via the graphic LCD touchscreen.

Pluggable backplane terminal bars simplify cabinet wiring, while the galvanically isolated RS485 interface and USB port transmit real-time and batch-averaged moisture values over long cable runs to supervisory PLC systems.

OLAS Optical Light Absorption Technology for Slurry Density and Concrete Water Recycling

The patented Optical Light Absorption Sensor (OLAS) transmits a controlled light beam into liquid-solid mixtures and measures light attenuation to determine solids concentration, turbidity, and density.

In ready-mix and precast concrete plants, OLAS monitors grey residual water in recycling basins and pipelines, allowing automated batching systems to compensate water and cement weights accurately.

Beyond concrete residual water, the optical absorption system tracks concentration changes in chemical pulp, mineral slurries, suspensions, and continuous foil or coating thickness processes.

Reference Calibration Workflow Using PMB Series Halogen Moisture Analyzers

Establishing accurate multi-point calibration curves for inline FSx probes relies on thermogravimetric reference testing with PMB 53, PMB 163, and PMB 202 laboratory moisture analyzers.

Representative material samples collected during live batching are weighed with 0.001 g readability and dried under uniform halogen bulb heating adjustable in 1 °C steps.

The resulting loss-on-drying percentage is paired with the raw sensor output using either the zero and span potentiometers inside the probe terminal box or the 40-point curve table in the FMP-2 processor, aligning inline readings with laboratory quality standards.

Werne & Thiel and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Werne & Thiel and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.