Audited Supplier
The KR-939SB4 Integrated Four-Parameter Composite Probe is a non-bus architecture, universal combined transmitter within the KR-939 series cooling tower fan safety monitoring system. It can simultaneously monitor the full vibration of the fan reducer in the X, Y, and Z orthogonal directions and the temperature of the lubricating oil inside the gearbox.This probe integrates four two-wire transmitters, outputting four channels of standard 4-20 mA current signals. It can interface with the Kere Company "KR-939B4 Fan Safety Monitor" or directly connect to computer data acquisition and control systems (e.g., DCS, PLC).
PARAMETERS OF THREE-PARAMETER COMBINED PROBE KR-939SB4
Main technical performance and indicators
External and installation structures:
The probe features a fully stainless steel waterproof enclosure with a weight of approximately 0.6 kg. It is designed with an external threaded interface for installation into the threaded mounting hole of the fan gearbox, with the temperature probe rod inserted into the gearbox interior. Thread specifications and probe rod insertion depth can be customized during ordering
Vibration Measurement Characteristics:
Measurement Range: 0~20 mm/s, Output Signal: Proportional to the True RMS (Root Mean Square) value of vibration velocity Frequency Band: 10~1000 Hz, Total Measurement Error: ±1 mm/s
Signal output characteristics:
Standard: DC 4~20 mA two-wire system output
Due to terminal limitations, the positive power terminals of the four independent two-wire transmitters inside the probe are internally connected to form a shared +V terminal.
Supply characteristics of power supply:
Maximum Operating Voltage: 40 V, Recommended Voltage: 24 V , No-Load Voltage: 15 V (with built-in reverse polarity protection) , Maximum Current per Transmitter: 30 m
Temperature Measurement Characteristics:
Measurement Range: 0~100 ºC, Total Measurement Error: ±1 ºC
Products Images:
Use installation:
KR-939SB4 integrated four-parameter combination probe is installed in the threaded hole on the upper part of the fan gearbox (or other equipment under test) in the form of external threads. The probe rod is inserted into the gearbox to obtain the lubricating oil temperature, lubricating oil level, and box vibration signals in the gearbox, and complete the transmission and output.
