Description:
QST-201 series 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).
Feature:
Range:0~0.6 mH2O....0~200 mH2O
Sealed structure: IP68.
Accuracy: 0.1% FS, 0.25% FS (standard)
There is two kinds of connector to be chosen: intracavity or flush membrane typ
Integrated construction, without external adjustment.
Dimensions: (unit: mm)
| 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 |
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 |
| 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 |
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 |
It is been widely used in environmental industry,hydraulic,chemical engineering,sewage etc.
QST-201 series 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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