Range
Products at a glance6
DGM digital grease measuring devices
Electronic measuring devices for precise recording and display of grease quantities in the lubrication circuit. Ideal for quality assurance and maintenance.
Flow sensor
Universal flow sensor for monitoring oil and liquid flows. Compact and low maintenance.
Flowmaster II
Volume flow measuring and setting device for precise dosing. Adjustable setpoints via intuitive control panel.
FLOW METER ATEX
ATEX-certified flowmeter for use in potentially explosive areas. Robust and precise.
Air/oil flow control sensor
Special sensor for monitoring the outlet air in the air/oil system – ensures correct lubricant supply.
Oil & Grease oval flow meter
Oval wheel flow meter for oil and grease with high measuring accuracy and low wear.
Technology
Technical data and selection
Flow sensors answer a different question from cycle sensors: not whether something indexed, but how much actually flowed. In circulating systems, where a bearing is fed continuously with oil, that is the only meaningful quantity — there is no cycle signal there at all.
| Parameter | Flow sensor | DGM grease meter |
|---|---|---|
| Measured quantity | 10 mm³ per stroke (smallest readable value) | 0.003–0.66 gpm (as published) |
| Max. pressure | – | 500 bar outlet · 1000 bar burst |
| Operating temperature | −5…+55 °C | max. 60 °C |
| Connection | M12×1 | BSP F 1/8″ G |
| Material / display | anodised aluminium | batch and totalising counter, 4 digits |
| Supply | – | battery, 24 months |
| Part number | 1525815 | 1527094 · 1527095 (pulser) |
Source: DropsA manufacturer data, retrieved 31 July 2026 – Flowsensor · DGM. The figures in the respective datasheet are binding.
Three measuring principles for three jobs
The flow sensor is a reed switch operated by a magnet on a pressure-driven piston. It counts strokes and therefore suits cyclically delivering pumps — it does not measure a quantity, it confirms passage. Its smallest readable value of 10 mm³ per stroke defines the resolution limit.
The DGM is a grease meter for dispensing at the grease gun or outlet valve, with batch and totalising counters. The interesting figure is not accuracy but the burst pressure of 1000 bar against a permitted outlet pressure of 500 bar: a factor of two in reserve, because a hand-operated grease gun produces pressure spikes nobody calculates in advance. DropsA publishes the measuring range in gpm; it is reproduced here unchanged.
The Flowmaster II measures volumetrically instead: the fluid moves a rotor on a fixed orbit and every revolution is registered optically. Because the displaced volume per revolution is constant, the result is independent of temperature and viscosity — it needs no compensation and no calibration to a particular oil. That is exactly what makes it usable on circulating systems with changing operating temperatures.
Source: DropsA manufacturer data, retrieved 31 July 2026 – Flowmaster II. The figures in the respective datasheet are binding.
The ATEX flow metering device for hazardous areas
For zones with a potentially explosive atmosphere DropsA carries a dedicated version marked Ex II 2GD C IIC T85 °C, IP 65 (part number 1525818). It works on the positive-displacement principle: a calibrated sequence of spools is moved by the oil flow and a proximity sensor registers that movement.
What matters in practice is the base-plate mounting: the device can be removed for calibration or replacement without disconnecting the tubing. In an Ex area that is no convenience feature — every opened connection there is its own procedure with its own permit. It is designed for volumetric monitoring of small flows on low-pressure lubrication systems.
Source: DropsA manufacturer data, retrieved 31 July 2026 – Durchflussmessgerät ATEX. The figures in the respective datasheet are binding.
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