An electromagnetic induction sensor for continuous drilling-fluid conductivity measurement, with temperature compensation and a 4-20 mA output for mud logging systems.
The CL-DD11 is an electromagnetic induction conductivity sensor designed to measure the conductivity of drilling fluid in a mud logging system. Its non-contact inductive measuring principle supports stable operation in conductive, corrosive drilling-fluid applications.
The sensor combines a transmitter and an immersion probe. A protective cover around the probe helps reduce accidental mechanical damage during wellsite use.
Power supply: 5-30 V DC; 24 V DC recommended.
Measurement range: 0-300 mS/cm; configurable for the application.
Output signal: 4-20 mA DC.
Measurement accuracy: ±2% FS.
Repeatability: ±0.25%.
Operating temperature: -20 to 60 °C.
Relative humidity: 0-95% RH.
The probe contains concentric transmitter and receiver coils. The transmitter coil generates an 8 kHz electromagnetic field while the probe is immersed in drilling fluid. Conductivity-dependent current in the fluid induces a corresponding signal in the receiver coil.
The transmitter conditions and amplifies the received signal, then produces a standard 4-20 mA DC output. An integrated thermistor monitors drilling-fluid temperature and compensates the conductivity reading to a reference temperature of 25 °C.
Install the probe so that its active measuring area remains immersed in the drilling fluid and protected from impact. Keep foreign material out of the probe guard.
Clean the probe promptly when drilling-fluid deposits accumulate. Regular cleaning helps preserve measurement stability and accuracy.
Main specifications and technical parameters The working voltage and the output signal: working voltage: 15 ~ 28VDC Output signal: 4 ~ 20mA (second line) Ambient temperature: -30～+70℃ Measuring…
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