DR3421 Differential Pressure Transmitter
DR3421 Differential Pressure Transmitter
By measuring the low-side pressure, and compare it to the high-side pressure, the DR3421 differential pressure transmitter can accurately measure differential pressure in the range of 35 bar. And the pressure transmitter adopt a high-performance special transmitter circuit, it features high static pressure and high anti-interference. Moreover, rugged stainless steel housing and three level lightning protection enables the sensor working in the harsh environment.
Applications
- Petroleum, chemical, electric power
- Mechanical engineering
- Process control and automation
- hydrology and flow pressure measure
- Hydraulic pressure
Features
- Reliable performance, easy to install;
- Short circuit protection and reverse polarity protection;
- Three level lightning protection;
- EMC certification;
- Intrinsic safe Ex-proof certification;
Technical Specs
| Measurement range | 0bar~35bar | Zero thermal drift | ≤±0.03%FS/℃ (≤1bar); ≤±0.02%FS/℃ (>1bar) |
| Static pressure | 200bar | Span thermal drift | ≤±0.03%FS/℃ (≤1bar); ≤±0.02%FS/℃ (>1bar) |
| Accuracy | ± 0.25% FS / ± 0.5% FS | Compensated Temp. | 0 ℃ ~ + 50 ℃ |
| Stability | ±0.2%FS(1 year) | Working temp. | -30 ℃ ~ + 70 ℃ |
| Output | 4mA~20mA DC(2-wire); 0/1V~5/10V DC(3-wire); | Storage Temp. | -30℃～+70℃ |
| Load | ≤(U-11)/0.02Ω(2-wire); ≥10k(3-wire); | Pressure interface | NPT1/2 NPT1/4 G1/2 G1/4 M20 * 1.5 |
| Response Time | (10%~90%): ≤1ms | Insulation resistance | 500MΩ@500V DC |
| Housing | stainless steel 304 | Protection level | IP65(2 wires); IP65(3 wires); |
| Diaphragm | stainless steel 316L | Power supply | 11V~28VDC(2 wires); 12V~28VDC(3 wires); |
| Sealing ring | Viton | Cable | Φ7.5mm Polyethylene Special Cable |
Ordering Guide
| DR3421 | Differential Pressure Transmitter | |||||
| Range | 0bar~35bar | |||||
| [0～X]bar | X: the actual measured pressure | |||||
| Code | Output signal | |||||
| E | 4mA～20mA DC | |||||
| V1 | 1V～5V DC | |||||
| V2 | 0V～5V DC | |||||
| V3 | 0V～10V DC | |||||
| Construction material | ||||||
| Code | Diaphragm | Pressure interface | Housing | |||
| M1 | SS 316L | SS 304 | SS 304 | |||
| M2 | SS 316L | SS 316L | SS 316L | |||
| Code | Notes | |||||
| B1 | 4-pin Plug connection | |||||
| B2 | Cable connection | |||||
| C1 | M20x1.5 male, face type seal | |||||
| C2 | M20×1.5 male, waterline seal | |||||
| C3 | G1/2 male | |||||
| C4 | G1/4 male | |||||
| C5 | G1/4 female | |||||
| C6 | NPT1/2 male | |||||
| C7 | NPT1/4 male | |||||
| D1 | 4digits LCD digital indicator(only for 4mA~20mA DC) | |||||
| D2 | 4digits LED digital indicator(only for 4mA~20mA DC) | |||||
| DR3421- | [0~1]bar | E | M1 | B1C5 | The whole spec |
Outline Construction (Unit: mm)
Electrical Connection
FAQ
How does a differential pressure transmitter work?
Differential Pressure transmitters measure the difference between two pressures, usually refers to input pressure and output pressure. They use a reference point called the low-side pressure and compare it to the high-side pressure. Ports in the instrument are marked high-side and low-side.
What is the purpose of differential pressure?
Differential pressure is used to determine if a pipeline or closed containers has any clogs or contaminates as particles flow through orifices and filters. If part of the pipe gets clogged, it will cause a change in the pressure, which causes differential pressure to increase or decrease.
What is the difference between differential pressure and static pressure?
The static pressure is positive when it is higher than atmospheric pressure, and negative when it is lower than atmospheric pressure. Dynamic pressure refers to the pressure generated by the flow of air. As long as the air flow in the duct, it has a certain dynamic pressure, and is positive.