EST350 Differential Pressure Transmitters
EST350 series differential pressure transmitters feature high reliability, high stability and high accuracy, which are widely used in liquid and gas differentia pressure measurement. The products adopt 1Cr18Ni9Ti stainless steel for ordinary applications. The imported oil-filled differential pressure sensors, special amplifier and V/I convertor are utilized to ensure resistance to high voltage, current and magnetic field and non-polarity leads. The products have been approved with intrinsic safety certification, explosion proof certification, ISO and CE certification.
Features
- Pressure type: Differential Pressure
- Range: 0~±5KPa…±5000KPa
- Accuracy: ±0.25%F.S, ±0.5%F.S
- Stability: 1%F.S/Year（typical）, 0.2%F.S/Year（maximum）
- Operating temperature: -40℃~85℃
- Signal Output: 4~20mA, 0/1~5V, 0~10V
- Power supply: 10/11~30Vdc/ac, 8~36Vdc/ac
- Diffused silicon-oil fill system
- Anti-EMI and Lightening protection
- Ingress Protection: IP68
- OEM: Available
| Range | Overload | Precision | Stability | Working Temperature | Insulation | Electric Strength | |
|---|---|---|---|---|---|---|---|
 | ±5kPa…±5000KPa | 1.5 times | ±0.1~0.5%F.S | 0.1~0.2%F.S/Y | -40～85℃ | >100M Ω @50V | 500V@60second |
| Two wire | Three wire | Three wire | Three wire | |
|---|---|---|---|---|
| Output Signal | 4~20mA | 0~5Vdc | 1~5Vdc | 0~10Vdc |
| Power Supply | 10~30Vdc | 8~36Vdc | 8~36Vdc | 11~30Vdc/ac |
| Load Resistance | (U-10)/0.02(Ω) | >100kΩ | >100kΩ | >100kΩ |
Application
Flow measurement | Wastewater treatment | Wind Diff Pressure undermine | Water Diff Pressure at hydropower station | urban flood control and waterlogging prevention | Underwater engineering | Groundwater monitoring | Central air-conditioning terminal control | Watersaving Irrigation
Technology
Piezoresistive based transducers rely on the piezoresistive effect which occurs when the electrical resistance of a material changes in response to applied mechanical strain. In metals, this effect is realized when the change in geometry with applied mechanical strain results in a small increase or decrease in the resistance of the metal. The piezoresistive effect in silicon is due primarily to changes at the atomic level and is approximately two orders of magnitude larger than in metals.
Sputter deposited thin film pressure sensor is a kind of Piezoresistive pressure sensors, difference exist that the thin-film sensor consists of a resistor pattern that is vaporized or sputter-deposited onto the force-summing element (the measuring diaphragm). In some transducers the resistors are not directly mounted on the diaphragm but are on a beam linked to the diaphragm by a push rod.
Accuracy and range for EST 3 series
