Sensors
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21 Sensors Reliable data recording with sensors Hydrotechnik produces a large range of high-quality sensors that are tuned perfectly to the measuring instruments. We offer a large variety of products in the fi elds of pressure, temperature and volume fl ow rate – the most suitable sensor is available for nearly every application. Due to our own development and production, we also have the competence, which is confi rmed by our own DKD calibration laboratory. We are fl exible enough to produce economically-rational customized sensor solutions. ISDS – automatic sensor data transmission All Hydrotechnik sensors are equipped with the „Intelligent Sensor Detection System“ (ISDS), where all sensor parameters, including the calibration data, are stored in the sensor. After switching-on, the measuring instrument automatically takes over all information from the connected sensor, and the time-consuming and error-prone process of entering parameters and linearisation tables is no longer necessary. This is reliable plug-and-play: connect – switch on – measure. Pressure sensors PR 15 Measuring sensor for mobile and stationary use, recommended for the Hydrotechnik measuring instruments of series Multi-System. ¡ Measuring principle: piezo-resistive (silicium chip embedded in silicone oil and welded in high-grade steel casing) ¡ Accuracy: ±0,2 % of fi nal value ¡ Readiness for operation: < 1 s ¡ Noise performance: < ±0,02 % of fi nal value ¡ Response time: < 1 ms ¡ Long-term stability: ±0,1 % of fi nal value per year ¡ Over-pressure: 1,5 times nominal pressure ¡ Burst pressure: 3 times nominal pressure ¡ Signal output: 0 to 20 mA ¡ Staggered measuring ranges: -1 to 600 bar (-0,1 to 60 MPa) ¡ Working temperature range: -40 °C to +120 °C ¡ Medium temperature: -40 °C to +130 °C ¡ Housing material: Stainless steel

22 Pressure sensors ¡ Measuring principle: piezo-resistive (polykristalline silicon strain gauge on a stainless steel diaphragm) ¡ Accuracy: ±0,25 % of fi nal value ¡ Readiness for operation: > 10 s ¡ Noise performance: < ±0,2 % of fi nal value ¡ Response time: 1 ms ¡ Long-term stability: ±0,1 % of fi nal value per year ¡ Over-pressure: 1,5 times nominal pressure ¡ Burst pressure: 3 times nominal pressure ¡ Signal output: 0 to 20 mA ¡ Staggered measuring ranges: -1 to 600 bar (-0,1 to 60 MPa) ¡ Working temperature range: -40 °C to +100 °C ¡ Medium temperature: -40 °C to +130 °C ¡...

23 Temperature sensors ¡ Temperature sensor: Pt 100 (Platinum-measurement resistor acc. to DIN 43760, class B) ¡ Temp. measurement range: -50 °C to +200 °C ¡ Accuracy: ±1 % of fi nal value ¡ Pressure load: max. 630 bar (63 MPa) ¡ Signal output: 4 to 20 mA ¡ Working temperature range: -20 °C to +80 °C (with reference to electronics) Immersion sensor Measurement sensor for mobile use that allows the reliable and fast measuring of a medium temperature. Screwed sensor Industrial sensor for mobile and stationary use that can be coupled under pressure. Surface sensor Measurement sensor for mobile...

24 Turbine Gear fl ow meters ¡ Good reproduceability ¡ Linearised error limits with reference to the measuring range: ±0,5 % to ±1,0 % of the current value ¡ Low fl ow resistance, broad range of applicable media ¡ Low response time (10 to 40 ms) ¡ Low weight, small fi tting size, free mounting orientation ¡ Medium temperature: max. +120 °C ¡ Working pressures: dependent on measuring range 35,0 to 40,0 MPa (350 bar to 400 bar) ¡ Very accurate measurements possible ¡ Error limits with reference to the measuring range: ±0,4 % to ±0,5 % of current value ¡ Viscosity-independent to a large...

25 Measuring range Viscosity Medium Material pmax Accuracy Filtering Consulting 1,0 to 10 2,0 to 75 9,0 to 300 l/min 16,0 to 600 Max. 60 cSt (1,0 to 10 / Typ RE 4) Max. 270 cSt (2,0 to 75 / Typ RE 4) Max. 270 cSt (9,0 to 300 / Typ RE 4) Max. 270 cSt (15,0 to 300 / Typ RE 4) Max. 270 cSt (7,5 to 100 / Typ RE 6) Max. 270 cSt (16,0 to 600 / Typ RE 6) Max. 270 cSt (25,0 to 600 / Typ RE 6) Mineral oils, HFA- and HFC-liquids, Skydrol, water a.s.o. AlZnMgCu 1,5 (3.4365), anodised or X10CrNiS189 (1.4305), passivised 400 bar (40,0 MPa) (1,0 to 10) 400 bar (40,0 MPa) (2,0 to 75) 400 bar (40,0 MPa)...

26 SENSOREN Flow rate sensors Turbine RE 4 with roller suppor for the use in mineral oil Technical data Viscosity range: 1 to 270 mm2/s (cSt) Medium temperature range: max. +120 °C Signal output: standard frequency on request 4 to 20 mA Material: housing: AlZnMgCu 1,5, surface protection by anodisination Factory calibration: mineral oil 30 mm2/s (cSt) for other viscosity see order data page 39 Pressure drop: max. 7,0 bar (0,7 MPa) due to measuring range at viscosity 30 mm2/s (cSt) Turbine RE 4 linearised meas. range Thread G pmax Mounting length L Error limits linearised of current value 1...

27 SENSOREN Loading valve For pump tests like e.g. the recording of pump curves dependent to pressure, we recommend our loading valve with integrated measuring turbine as a useful test equipments. Technical data Measuring range: 12 to 600 l/min Error limit: ±0,5 % of measured value at 30 mm 2/s (cSt) Viscosity range: 3 to 200 mm 2/s (cSt) Working pressure: max. 420 bar Working temperature: -20 °C to +80 °C (short time up to 100 °C) Connector: ISO 228-G1 1/4 (infl ow or outfl ow) Dimensions: 295 x 146 x ca. 208 mm (L x W x H) Application: preferably for hydraulic and other oils based on...

28 without refl ection mark no measurement of rotational speed without refl ection mark Polarisation fi lter with 0° and 90° gate Refl ection mark triggers 90° rotation Optics Sender Receiver With refl ection mark Rotational speed sensors ¡ Light source: high-performance LED with visible, intermittent red light ¡ Range: min. 50 mm to max. 4000 mm (depends on size of refl ection mark) ¡ Signal cycle frequency: max. 500 Hz ¡ Signal output: frequency (dependent on power supply); optional analogue signal 4 to 20 mA ¡ Working temperature range: -10 °C to +60 °C Function principle Rotational...