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| Categories | 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 |
| Company Info. |
| Xi 'an Qinwei Instrument Factory (General Partnership Enterprise) |
| Verified Supplier |
| View Contact Details |
| Product List |
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.
| 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.
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