Hydrostatic Level Transmitter


The RB21W represents a fully sealed submersible hydrostatic level transmitter, featuring the integration of a highly stable and reliable piezo-resistive pressure sensor enclosed within a durable stainless-steel housing. This integrated design, coupled with standardized signal output, offers users a straightforward and convenient solution for their on-site applications. The specialized cable, securely connected to the housing, allows for prolonged immersion in various media.

The RB21W hydrostatic level transmitter boasts a compact and lightweight design, delivering exceptional stability. Its versatility makes it suitable for liquid level measurement and control across a range of industries, including fuel, metallurgy, hydropower stations, mining, city water supply, and well and drainage systems, among others.

Features of Hydrostatic Level Transmitter

• Welded construction, excellent reliability and stability

• IP68 housing

• Molecular filter at the end of Air vent tube

• Wide measuring range upto 200 meterH20


• Liquid height measurement in tank

• Bore well level measuring

• Continues level monitoring of liquid


Performance Characteristics
Measuring Range Over pressure Accuracy Long term stability Response time Compensated temperature range Process temperature Process pressure
0... 1~ 0... 200 mH O 2 times FS 0.5% FS <0.3 % FSR/year <5ms -10 ... 55 C -30 ... 80 C Refer measuring range for Process pressure
Material of Construction Electrical Connection
Diaphragm Housing Sealing Cable Cable
SS316L SS304 Viton 7.5mm Polyurethane Cable As per measuring range/ ordering code
Output Signal Power Supply
Current output Voltage output Voltage supply range
4 ... 20 mA, 2-wire 0~5VDC
11 ... 30V DC, with 4 ... 20 mA output signal
15 ... 30V DC, with 0 ... 1 0V output signal
5V DC ratiometric ... with 0.5 ... 4.5V output signal
Measuring Range (mH2O) Cable Length (m)
0...1 5
0...2 5
0...4 5
0...6 7
0...10 11
0...20 21
0...50 51
0...100 101
0...150 151
0...200 201

Dimensional Drawings (mm)

Electrical Connection

Wire Color Connection
Red +V
Green 0V/+OUT
Yellow NA
Blue NA

Ordering Code

Level Transmitter
Range 0...1 mH2O~0...200 mH2O
[0~X] Bar X:the actual measured pressure
Code Output signal
I 4~20mADC
V1 0~5VDC
V2 0~10VDC
V3 0.5~4.5VDC
Code Cable length
5m Length in meter
RB21W (0...1mH O) I 5m