Grunewald electromagnetic flow meters, turbine meters and pressure transmitters

Grunewald industrial measurement instrumentation: MAGIN-Ex flow meters, SMALL V turbine sensors up to 400 bar, SIMPL-Ex pressure transmitters, and DA/DAK switches.

Grunewald MAGIN-Ex electromagnetic flow meters with circuit redundancy

MAGIN-Ex electromagnetic instruments measure volumetric flow rates of industrial fluids, water, and emulsions without moving parts in the flow bore. The engineered architecture incorporates dual signal loops and supports integrated fluid temperature and pressure monitoring sensors.

Obstructionless magnetic inductive sensing preserves pipeline flow area without drop
Redundant electronic circuits deliver high operating dependability in critical loops
Optional inputs accommodate simultaneous line pressure and fluid temperature sensors
Field programmable analog and frequency outputs interface smoothly with plant networks

Grunewald SMALL-Ex SMALL V high-pressure turbine flow meters to 400 bar

Precision SMALL V turbine meters evaluate water and oil emulsion flow rates in hydraulic networks operating under static line pressures up to 400 bar. A balanced turbine rotor mounted on precision bearings transmits pulses to an inductive pickup, providing linear calibration curves.

Heavy-duty alloy body withstands static fluid working pressures reaching 400 bar
Proven endurance against fluid pressure ripples and particulate matter in emulsions
High measurement repeatability maintained across forward and reverse pipeline flow
Compact stainless steel enclosure allows space-saving assembly in crowded skids

Grunewald SMALL-Ex ViscoFlow gear flow meters for viscous pure oil

Intrinsically safe ViscoFlow positive displacement meters monitor mineral, synthetic, and hydraulic oils exhibiting broad kinematic viscosity ranges. A matched pair of precision internal gears rotates with passing fluid, providing exact volume registration with minimal head drop.

Precision gear pair mechanism accommodates viscous lubricants and hydraulic fluids
Intrinsically safe electrical design approved for hazardous industrial atmospheres
Optimized fluid channel geometry minimizes internal flow drop across moving gears
Digital pulse transmitter delivers pulse frequency strictly proportional to volume

Grunewald DA and DAK mechanical flow indicators and limit switches

Deflection flap indicators in series DA and DAK mount in horizontal or vertical pipelines monitoring water and emulsion flow. The DAK model incorporates an adjustable dry reed switch contact providing reliable alarm trip signals without requiring external excitation power.

Universal mounting in any plane without altering measurement scale calibration
Direct mechanical pointer dial provides immediate local visual rate indication
Potential-free dry reed switch in DAK models trips reliably during low flow events
Rugged metallic housing withstands hydraulic water hammer shocks in closed loops

Grunewald SIMPL-Ex piezoresistive pressure sensors for hydraulic shields

Heavy-duty SIMPL-Ex pressure transmitters monitor hydraulic fluid pressure within powered mining shield legs and support props. The reinforced piezoresistive diaphragm endures cyclic mining loads and shock pressure peaks reaching 1,000 bar without calibration drift.

High endurance against intense mechanical shock vibration in extraction environments
Standardized Stecko plug couplings provide rapid leak-free hydraulic connection
Unified analog current output transmits real-time telemetry to supervisory computers
Hermetically sealed explosion-proof transmitter housing ensures long service life

Grunewald SMALL T temperature sensors and SMALL-Ex hydrostatic level probes

Instruments for secondary process variables include Pt1000 RTD probes in the SMALL T line and hydrostatic transmitters in the SMALL-Ex level line. This equipment delivers continuous thermal monitoring for heavy bearings and liquid depth tracking within tanks and vessels.

Rapid-response thin-film platinum RTD sensing element provides precision measurements
Alternative bimetallic thermal trip switch variant SMALL TS for over-temp alarms
Hydrostatic head measurement in vented vessels unaffected by foaming surfaces
Companion SMALL-Ex inclinometer monitors boom pitch and roll on continuous miners

German engineering traditions and Grunewald sensor production in Hamm

The industrial history of Grunewald GmbH began in 1976 with the development of precision measuring instruments and sensors in Remscheid, Germany. Later, corporate headquarters and primary manufacturing operations relocated to Hamm in North Rhine-Westphalia.

From its origins, the plant has engineered dependable measuring instrumentation for heavy extraction sectors.

In-house engineering laboratories and test facilities in Hamm ensure complete production oversight under commercial register entry HRB 3030.

Executive directors Michael Wolf and Moritz Wolf have guided the expansion of intrinsically safe instrumentation lines, delivering monitoring assemblies to subterranean mining tunnels and processing plants internationally.

Operating principles and circuit layout of MAGIN-Ex flow meters

MAGIN-Ex electromagnetic flow meters employ magnetic inductive principles to measure volumetric flow of conductive liquids, water emulsions, and industrial water.

The internal bore contains zero throttle restrictions, measuring orifices, or spinning impellers, which prevents particulate sedimentation and eliminates parasitic hydraulic pressure drop in pipelines.

A principal mechanical benefit of MAGIN-Ex architecture is complete electronic duplication of sensor amplifier stages. If a primary processing channel encounters an anomaly, redundant circuitry maintains uninterrupted signal evaluation without halting data transmission to supervisory systems.

Auxiliary inputs support parallel fluid temperature and pressure probes.

High-pressure SMALL V turbine meters for hydraulic emulsion networks

In subterranean hydraulic networks, working fluid pressures of water-oil emulsions frequently reach extreme thresholds. Grunewald SMALL-Ex series SMALL V turbine meters are built for continuous static fluid working pressures reaching 400 bar.

The rugged stainless steel housing readily withstands cyclic fluid pulsations generated by high-power plunger pumps.

A balanced turbine rotor featuring profiled blades rotates smoothly within precision low-friction bearings. Rotor velocity is monitored by a non-contact inductive sensor through the solid pressure wall of the sealed housing.

Symmetrical internal flow geometry provides consistent linear calibration response during forward and reverse fluid circulation.

ViscoFlow gear meters for high-viscosity hydraulic oils and lubricants

Monitoring volumetric flow rates of lubricating oils and heavy hydraulic media demands positive displacement principles unaffected by viscosity variations. Grunewald SMALL-Ex ViscoFlow meters employ a pair of precision spur gears driven by fluid stream movement.

Each gear revolution displaces a calibrated fluid volume from the internal measuring chamber.

An integrated inductive pulse pickup generates a stream of digital pulses with frequency proportional to instantaneous volumetric flow rate.

Intrinsically safe electrical construction enables reliable deployment in explosive oil cellars, rolling mills, and heavy equipment gearboxes without risk of igniting hydrocarbon vapors or combustible atmospheres.

DA and DAK flow indicators and limit switches in emergency cooling loops

Deflection flap meters in the DA and DAK series perform continuous surveillance of cooling water supply across heavily loaded machine bearings and cutting heads.

An internal mechanical flap deflects against calibrated spring resistance with passing liquid, conveying shaft movement to an external pointer dial via non-contact magnetic coupling across a sealed wall.

The DAK variant incorporates an adjustable potential-free reed switch that trips whenever flow velocity drops below a preset alarm threshold.

The switch operates without external electrical power to trigger trips, ensuring immediate shutdown of protected compressor drives, rock crushers, or pump units upon sudden supply line rupture or flow starvation.

SIMPL-Ex pressure sensors for powered roof supports and heavy machinery

Deploying powered roof supports in longwall mining faces involves severe dynamic rock shocks against overhead canopy structures. Grunewald SIMPL-Ex pressure transmitters deliver direct monitoring of fluid pressure within hydraulic support leg cylinders.

The rugged piezoresistive diaphragm construction withstands sudden hydraulic shock waves up to 1,000 bar.

Standardized Stecko staple-lock couplings provide dependable tool-free insertion directly into hydraulic valve blocks on shield assemblies.

An integrated electronic amplifier converts sensor deflection into a noise-immune analog current signal, transmitting continuous telemetry to surface dispatchers to monitor strata pressure distribution and prevent roof collapse.

Gruenewald 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 Gruenewald and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.