EST370 Absolute Pressure Transmitters

EST370 line Absolute Pressure Transmitters references to the absolute (vacuum) pressure. The product covers all the constructions and output connections of the company.

Absolute Pressure (PABS) =Relative Pressure (Pg) +Atmospheric Pressure (B)
Vacuum Degree (Kv) =Atmospheric pressure (B)-Absolute pressure (PABS)，Kv=B-PABS, (B>PABS)

Features

Pressure type: Absolute Pressure
Range: any pressure between 0.01MPa~40MPa
Accuracy: ±0.25%F.S, ±0.5%F.S
Stability0.25%F.S/Year (typical), 0.4%F.S/Year (maximum)
Customized working temperature: -40℃~125℃
Signal Output: 4~20mA, 0/5~10V
Power supply: 10/11~30Vdc, 6~24Vdc, 10/20~36Vac
OEM: Available

	Range	Overload	Precision	Stability	Working Temperature	Insulation	Electric Strength
	0.01MPa…40MPa	1.5 times	±0.25~±0.5%F.S	0.25~0.4%F.S/Y	-40～85℃	>100MΩ@50V	500V@60second

	Two wire	Three wire	Three wire	Three wire	Three wire
Output Signal	4~20mA	0~5Vdc	0~5Vdc	0~10Vdc	0~10Vdc
Power Supply	10~30Vdc	6~24Vdc	10~36Vac	11~30Vdc	20~36Vac
Load Resistance	(U-10)/0.02(Ω)	>100kΩ	>100kΩ	>100kΩ	>100kΩ

Application

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.