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Absolute Pressure Transmitter , Double Chamber Differential Pressure Transmitter

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Absolute Pressure Transmitter , Double Chamber Differential Pressure Transmitter

Brand Name : QINWEIYB

Model Number : QWYB-521

Certification : Explosion-proof certificate ，Safety certificate

Place of Origin : China

MOQ : 1Set

Price : Negotiable

Payment Terms : Western Union,T/T,D/P,D/A,L/C

Supply Ability : 100PCS/Month

Delivery Time : 5-8 work days

Packaging Details : Carton

Span Output : 50±10mV(≤20KPa),100±10mV(≥35 KPa)

Mounting : Threaded

Voltage : 5±0.5VDc

Grade : Industrial

Accuracy : ±0.25% FS

Pressure Medium : gas or liquid

Process Medium : Liquids, gases, or steam

Protection Rating : IP67

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Double Chamber Structure Can Measure Absolute Pressure And Absolute Pressure Differential Pressure Transmitter

An absolute pressure differential transmitter is essentially a differential pressure transmitter, but its low-pressure side (reference end) is permanently sealed and evacuated to a high vacuum, forming an absolute pressure reference benchmark.

Structural Features
  1. Core Sensor: Utilizes piezoresistive, capacitive, or resonant sensors. The sensor diaphragm senses the pressure on both the H side and the L side.
  2. Key Process: During manufacturing, the reference cavity on the low-pressure side (L) is evacuated and permanently sealed. This vacuum cavity serves as the "absolute zero pressure" reference point.
  3. Measurement Process: The process pressure acts on the high-pressure side (H) diaphragm and is compared with the vacuum reference on the low-pressure side (L). The sensor directly outputs a signal proportional to the absolute pressure at the H side.
Comparison with related instruments
Characteristics Absolute pressure differential pressure transmitter Ordinary absolute pressure transmitter Ordinary differential pressure transmitter
Reference basis The low-pressure side is absolute vacuum The sensor reference cavity is absolute vacuum The low-pressure side is open to the atmosphere (gauge pressure) or another process pressure
Measurement output The absolute pressure of the high-pressure side (P_H abs) The absolute pressure at the connection end (P abs) The pressure difference between the high and low-pressure sides (P_H - P_L)
Essence Special configuration differential pressure transmitter Dedicated design absolute pressure instrument General differential pressure instrument
State of the low-pressure side Permanently sealed vacuum Integral sealed vacuum Open or connectable
Can it measure differential pressure No (unless the seal is broken) No Yes
Main applications Negative pressure systems requiring absolute pressure, high static pressure absolute pressure measurement General absolute pressure measurement (vacuum, meteorology, calculation) Flow, level, general differential pressure
Flexibility Medium (fixed as absolute pressure, but the hardware is differential pressure) Low (dedicated) High (can be connected as gauge pressure, absolute pressure, differential pressure)

The absolute pressure differential transmitter is a functionally specific but extremely useful "variant" in the family of differential pressure transmitters. It ingeniously utilizes the dual-chamber structure of the differential pressure transmitter by "fixing" one end at absolute zero, thereby achieving the function of absolute pressure measurement.


Product Tags:

Differential Pressure Transmitter

      

Absolute Pressure Transmitter

      

Double Chamber Pressure Transmitter

      
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Absolute Pressure Transmitter , Double Chamber Differential Pressure Transmitter Images

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