1. Homepage
  2. Products
  3. Condition monitoring systems
  4. Systems for oil quality monitoring
  5. Moisture measurement in air and oil
  6. LDH100

For 8-pole sockets the core colours are not standardised.
Please note the wiring of the sensor and the sockets (see data sheet).

Oil humidity sensor



{{'OPTIONAL_INFO' | productAvailability | error}}

Dear customer,
Unfortunately, this data sheet is not available in the requested language. If you have any further questions, you can contact us by e-mail.

Best regards
Your ifm team

  • Continuous condition monitoring of oils and air
  • Two analogue outputs for relative moisture and temperature
  • High pressure rating
  • Quick installation via process connection
  • ce
  • eac
Technische Details
Media mineral oils; synthetic esters; biodegradable oils; air
Tank pressure [bar] 50
Medium temperature [°C] -40...105
Electrical data
Operating voltage [V] 9...33 DC
Current consumption [mA] < 25
Protection class III
Reverse polarity protection no
Inputs / outputs
Number of inputs and outputs Number of analogue outputs: 2
Total number of outputs 2
Number of analogue outputs 2
Analogue current output [mA] 4...20
Max. load [Ω] 8; ((Ub - 8) x 25)
Resolution of analogue output φ: 1% / T: 0.1 K
Measuring/setting range
Temperature monitoring
Measuring range [°C] -20...120
Accuracy / deviations
Accuracy φ: ± 3 % / T: ± 2 %
Response times
Response time [s] 1.3
Operating conditions
Ambient temperature [°C] -40...85
Storage temperature [°C] -40...85
Max. relative air humidity [%] 100
Protection IP 67
Tests / approvals
EN 13309
IEC 61000-6-2 : 2005
IEC 61000-6-4 : 2006 + AMD1: 2010
Vibration resistance
test following DIN EN 60068-2-6
MTTF [years] 90
Mechanical data
Weight [g] 176.5
Materials (wetted parts) aluminium; HNBR; polyurethane resin; epoxy resin
Process connection G 3/4
accuracy values expressed in percent refer to the measuring span
Notes For 8-pole sockets the core colours are not standardised.; Please note the wiring of the sensor and the sockets (see data sheet).
Pack quantity 1 pcs.
Electrical connection
Connection Connector: 1 x M12
ifm electronic gmbh • Friedrichstraße 1 • 45128 Essen — We reserve the right to make technical alterations without prior notice. — EN-GB — LDH100-01 — 08.07.2016 —