Description:
QST-202 liquid level transmitters are consisting of well-sealed immerging oil-filled liquid level transducers and special circuit for manometers. Have characteristics of high precision, good stability, long life and easy to fix. Adopt special sealed configuration, so with good capability of anti-leakage. According the relation between pressure, density and liquid level, the liquid level transducers measure the liquid pressure which in direct ratio with depth of liquid, then via amplificatory circuit, the measured pressure is transferred to standard 4~20mA current signal(or standard voltage signal).
FeatureS:
Wide measurement range
Sealed structure: IP68.
Various output signal
CE Certificate
Marking : ExiaIIBT6 Ga
Integrated construction, LED display can be choosing.
Dimensions: (unit: mm)
Specifaction:
| Static accuracy |
%FS |
±0.1, ±0.25(Standard) |
| Zero adjustment |
%FS |
≤±0.25 |
| Span adjustment |
%FS |
≤±0.25 |
| Long-term stability |
<±0.1%FS/year (>20mH2O ) ±10mm ( ≤20mH2O ) |
| Response time |
ms |
<2 |
| Storage temp. |
ºC |
-40~+100 |
| Operation temp. |
ºC |
-20~+80 |
| Compensated temp. |
ºC |
-10~+60 |
| Temp. coefficient of ZERO |
%FS/10ºC |
≤0.2 |
| Temp. coefficient of SPAN |
%FS/10ºC |
≤0.2 |
| Insulation resistance |
M Ω |
≥500 @ 100 Vdc |
| Load resistance |
current output, Ohm |
250~1100 |
| voltage output, Ohm |
>5000 |
| Environmental protection |
IP rating |
IP 68 |
| pressure memberane material |
Liquid which are compatible to 316L stainless steel |
| Material for housing |
Stainless steel(1Cr18Ni9Ti) |
| Electrical connection |
connector/cable |
4-core,Ф7.6 mm shielded cable with
vent pipe which is mechanically strong
enough for deep submersible liquid level
measurements |
| Measuring media |
|
Liquid which are compatible to 316L stainless steel |
| Measuring range |
mH2O |
0~0.6,0~1,0~2,0~5,0~10,0~20,0~30, |
| 0~50,0~100,0~150,0~200 |
| Overload pressure |
%FS |
150 |
| Signal output |
transmitter, Vdc (3 wires) |
0~5V, 1~5V, 0~10V, 0~20mA |
| transmitter, mA (2 wires) |
4~20mA |
It is been widely used in environmental industry,hydraulic,chemical engineering,sewage etc.
QST-202 liquid level transmitters are consisting of well-sealed immerging oil-filled liquid level transducers and special circuit for manometers. Have characteristics of high precision, good stability, long life and easy to fix. Adopt special sealed configuration, so with good capability of anti-leakage. According the relation between pressure, density and liquid level, the liquid level transducers measure the liquid pressure which in direct ratio with depth of liquid, then via amplificatory circuit, the measured pressure is transferred to standard 4~20mA current signal(or standard voltage signal).
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