testo 6381 – for cleanrooms and hygiene zones
For cleanroom applications and different hygiene zones in e.g. hospitals.
- Zero in zero-point operation thanks to automatic zeroing
- Effective overpressure protection
- Measures very low differential pressures (minimum measuring range 0...10 Pa)
The testo 6381 transmitter series is specially designed for cleanroom applications and various hygiene zones in hospitals, for example. Maintaining an overpressure prevents pollutants from entering sensitive areas. It is also possible to connect external wall or duct sensors for measuring moisture values. If necessary, it is also possible to calculate air flows by measuring the differential pressure in a pitot tube (prandtl tube).
The testo 6381 is one of the most accurate instruments and there are 18 different measurement ranges to choose from when ordering, from 0 ... 10 Pa up to -1,000 ... 1,000 hPa. Thanks to the automatic zeroing, there is no zero point drift. This transmitter also has no temperature dependency as zeroing is done at the process temperature. It also has a very good overpressure protection of 140% of the measuring range, as well as alarm management with adjustable response time and alarm acknowledgement.
- Zero in zero-point operation thanks to automatic zeroing
- Effective overpressure protection
- Measures very low differential pressures (minimum measuring range 0...10 Pa)
- High long-term stability and repeatability
- Display (optional)
- Temperature and humidity sensors (optional)
- Can also be delivered with other print areas, call for more info.
Contact us for prices and more information
| Measurement ranges | 0 ... 10 Pa 0 ... 50 Pa 0 ... 100 Pa 0 ... 500 Pa 0 ... 10 hPa 0 ... 50 hPa 0 ... 100 hPa 0 ... 500 hPa 0 ... 1000 hPa -10 ... 10 Pa -50 ... 50 Pa -100 ... 100 Pa -500 ... 500 Pa -10 ...10 hPa -50 ... 50 hPa -100 ... 100 hPa -500 ... 500 hPa -1000 ... 1000 hPa |
| Measurement uncertainty | ±0.5% of the measuring range final value ±0.3 Zero drift: 0% (thanks to regular zero adjustment) |
| Units of measurement | Differential pressure in Pa, hPa, kPa, mbar, bar, mmH2O, kg/cm2, PSI, inch HG, inch H2O Calculated parameters: air flow in m3/h, l/min, Nm3/h, Nl/min Airspeed in m/s, ft/min |
| Sensor | Piezoresistive sensor |
| Automatic zero point adjustment | Via solenoid valve Adjustable interval: 15 sec, 30 sec, 1 min, 5 min, 10 min |
| Measurement accuracy | 0.35 Pa +0.5% of the measuring range (0.3 Pa = measurement uncertainty of reference) |
| Overload | Depending on the measurement range, see PDF |
| ANALOG OUTPUTS | |
| Quantity | Default: 1. With humidifier as an option: 3 |
| Output type | 0/4 … 20 mA (4-wire) (24 VAC/DC) 0 … 1/5/10 V (4-wire) (24 VAC/DC) |
| Scale | Difference pressure scale ±50% of the final value of the measuring range. Freely scalable within the measurement range. |
| Measurement interval | 1/sec |
| Resolution | 12 pieces |
| Max load | 500 ohms |
| OTHER OUTPUTS | |
| Ethernet | Optional |
| Relay | Optional: 4 relays (can be freely assigned to measurement channels or used as a common alarm in the function menu / P2A), up to 250 VAC/3A (NO or NC) |
| Digital | Mini-DIN for P2A software |
| POWER SUPPLY | |
| Voltage supply | 20 … 30 VAC/DC, 300 mA current consumption, signal and supply galvanically separated |
Moisture probes
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