WGM
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Catalog excerpts

WGM - 1

The Drive & Control Company Rexroth Bosch Group Humidity Sensor WGM RE 51550 Edition: 2019-06 ► Measurement of relative humidity and temperature ► Output signal 4 ... 20 mA or lO-Link ► Operating Pressure up to 50 bar Humidity sensors enable quick and reliable online monitoring of the water activity in hydraulic and lubricating oils. They have the following characteristics: ► Permanent measurement of relative humidity and temperature ► Require no calibration on the respective oil ► Quick indication of changes ► High measurement accuracy and stability ► Easy connection to external control systems Technical data WGM-B 5 Technical data WGM-D/ WGM-R 6 RE 51550, edition: 2019-06, Bosch Rexroth AG

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WGM - 2

Humidity sensor | Type WGM Bosch Rexroth AG, RE 51550, edition: 2019-06

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WGM - 3

Humidity sensor | Type WGM 3/8 Product description Mineral oils (e.g. HLP) have a comparatively low water absorption capacity. With 500 ppm generally indicating oversaturation of the oil and the presence of free water. For ester oils (e.g. HEES), which can contain relatively large quantities of water, the oil saturation at 500 ppm would be approximatley 15 %. Warm oil can dissolve more water than cold oil. It is therefore possible that when oil is cooled down from its operating temperature, that the seemingly dry oil may contain free water. Irrespective of the oil type and temperature, the...

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WGM - 4

Humidity sensor | Type WGM General Operating pressure max. Medium Threaded connection Max. tightening torque Sensor length from sealing surface Max. flow velocity at sensor Media resistance G3/4" pipe thread, Eolastic seal 20 Nm_ 36 mm 5 m/s Fluids based on mineral oil (other fluids on request) Technical data WGM-B Sensor variant WGM-B Ambient temperature Supply voltage (UB) Material/version Housing Stainless steel/aluminum Material in contact with media 1.4301, 1.4571, 2.4478, FR4, glass *with fitted plug-in connector Baud rate SIO mode Min. cycle time Humidity measurement Measurement...

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WGM - 5

Humidity sensor | Type WGM 5/8 Technical data WGM-B Switching output for humidity PNP switching output 1 Fixed setting at 80 % relative humidity Temperature measurement Measurement range Accuracy Analog output Tolerance Load O Outputs WGM-B Switching output (fixed setting) X Analog output for humidity X Analog output for temperature X RE 51550, edition: 2019-06, Bosch Rexroth AG

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WGM - 6

Humidity sensor | Type WGM Technical data WGM-D/ WGM-R Sensor with display and control unit Evaluation and indication electronics Display 4-digit, 7-segment LED Indicator unit 0 ... 100 % relative humidity Operation using 3 keys Memory Storage of min./max. values Current consumption upon switch-on approx. 100 mA for 100 ms Current consumption in operation approx. 50 mA (no current nor switching out puts) Supply voltage (UB) 18 ... 30 V DC (nominal voltage 24 V DC) Version Fastening Weight Display housing Protection class WGM-R remote display 35 mm top hat rail mounting approx. 130 g PA_...

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WGM - 7

Humidity sensor | Type WGM Humidity measurement Measurement range 0 ... 100 % rel. humidity Analog output Selectable current or voltage output (4 ... 20 mA, 2 ... 10 V, 0 ... 10 V or 0 ... 5 V) Load O (current output) = (Ub - 8 V) / 0.02 A Switching outputs PNP switching output Selectable switching function and switching output Switching current max. 0.2 A per output Temperature measurement Measurement range -20 °C ... +120 °C Analog output Selectable current or voltage output (4 ... 20 mA, 2 ... 10 V, 0 ... 10 V or 0 ... 5 V) Load O (current output) = (Ub - 8 V) / 0.02 A Outputs...

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WGM - 8

Humidity sensor | Type WGM Pin assignment WGM-D/ WGM-R Sensor connection socket Connector A WGM-D/ WGM-R 2A2S Installation recommendations For the humidity sensor to function properely, ensure that the sensor element is fully and permanently immersed in the oil. The sensor is suitable for lateral tank installation if installed below the minimum filling level. In the event of return line installation ensure that the maximum flow velocity is not exceeded. With the WGM-R option, the remote display is mounted onto a profile rail. Guidelines and standards The development, manufacture and...

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