Testo 521-3 Differential pressure measuring instrument
Precise Pitot tube measurement
Testo 521-3 is highly accurate differential pressure measuring instruments with an internal sensor.
Testo 521-3 has a measuring range of 0 to 2.5 hPa and records even the smallest pressure differences without difficulty. Its high accuracy and a resolution of 0.1 Pa make it ideal for differential pressure measurements in cleanrooms. In combination with the Pitot tube, the internal sensor measures flow velocities from 1 to 20 m/s. The testo 521-3 is also equipped with two probe inputs for the connection of further probes for the measurement of pressure and temperature.
- Temperature-compensated differential pressure sensor in instrument
- Additional 2 probe inputs for the connection of further probes for the measurement of pressure and temperature
- Direct calculation of flow velocity and volume
- zeroing of display value from pressure probes
- Display of Hold-, max. and min. values
- Easy data storage by measurement site as well as analysis, archiving and documentation via optional PC software
- Point and timed mean value calculation
Testo 521-3General technical data |
|
|---|---|
| Dimensions | 219 x 68 x 50 mm |
| Operating temperature | 0 to +50 °C |
| Housing | ABS |
| Channels | 2; 1 |
| Measuring rate | 0.04 s |
| Connection | Hose: inner Ø 4 mm outer Ø 6 mm |
| Battery type | 9 V (6LR61) |
| Battery life | Continuous operation w/ internal pressure sensor: 30 h; With rech. battery: 10 h; With carbon battery: 18 h |
| Display type | LCD |
| Display function | 7 segment display and point matrix |
| Display update | 2x per second, in fast measurement 4x per second |
| Power supply | Battery/Rechargeable battery,Mains unit 12 V |
| Interface | RS232 |
| Memory | 100 kB; 25,000 measuring values |
| Storage temperature | -20 to +70 °C |
| Weight | 300 g |
| Differential pressure (external probe) – Ceramic | |
|---|---|
| Measuring range | -1 to 400 bar |
| Accuracy | ±0.2 % of fsv* |
| Resolution | 0.01 bar |
*Accuracy information applies only to instrument without probes connected
| Differential pressure (external probe) – Piezoresistive | |
|---|---|
| Measuring range | 0 to 2000 hPa |
| Accuracy | ±0.1 % of mv* |
| Resolution | 0.1 Pa (0638 1347)
0.01 hPa (0638 1547) 0.001 hPa (0638 1447) 0.1 hPa (0638 1847 / 0638 1647) |
*Accuracy information applies only to instrument without probes connected
| Differential pressure (internal sensor) – Piezoresistive | |
|---|---|
| Measuring range | 0 to 2.5 hPa** |
| Accuracy | ±0.5 Pa (0 to 20 Pa)
±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa) |
| Resolution | 0.1 Pa |
| Static pressure | 1000 hPa |
| Overload | 50 hPa |
| Zeroing | to 0.5 hPa |
**Sensor is not suitable for long-term measurements
| Temperature – NTC | |
|---|---|
| Measuring range | -40 to +150 °C |
| Accuracy | ±0.2 °C (-10 to +50 °C)*
±0.4 °C (Remaining Range)* |
| Resolution | 0.1 °C |
*Accuracy information applies only to instrument without probes connected
| Temperature – TC Type K (NiCr-Ni) | |
|---|---|
| Measuring range | -200 to +1370 °C |
| Accuracy | ±0.4 °C (-100 to +200 °C)*
±1 °C (Remaining Range)* |
| Resolution | 0.1 °C |
*Accuracy information applies only to instrument without probes connected
- Overview
-
Testo 521-3 Differential pressure measuring instrument
Precise Pitot tube measurement
Testo 521-3 is highly accurate differential pressure measuring instruments with an internal sensor.
Testo 521-3 has a measuring range of 0 to 2.5 hPa and records even the smallest pressure differences without difficulty. Its high accuracy and a resolution of 0.1 Pa make it ideal for differential pressure measurements in cleanrooms. In combination with the Pitot tube, the internal sensor measures flow velocities from 1 to 20 m/s. The testo 521-3 is also equipped with two probe inputs for the connection of further probes for the measurement of pressure and temperature.
- Temperature-compensated differential pressure sensor in instrument
- Additional 2 probe inputs for the connection of further probes for the measurement of pressure and temperature
- Direct calculation of flow velocity and volume
- zeroing of display value from pressure probes
- Display of Hold-, max. and min. values
- Easy data storage by measurement site as well as analysis, archiving and documentation via optional PC software
- Point and timed mean value calculation
- Technical Specifications
-
Testo 521-3
General technical data
Dimensions 219 x 68 x 50 mm Operating temperature 0 to +50 °C Housing ABS Channels 2; 1 Measuring rate 0.04 s Connection Hose: inner Ø 4 mm outer Ø 6 mm Battery type 9 V (6LR61) Battery life Continuous operation w/ internal pressure sensor: 30 h; With rech. battery: 10 h; With carbon battery: 18 h Display type LCD Display function 7 segment display and point matrix Display update 2x per second, in fast measurement 4x per second Power supply Battery/Rechargeable battery,Mains unit 12 V Interface RS232 Memory 100 kB; 25,000 measuring values Storage temperature -20 to +70 °C Weight 300 g Differential pressure (external probe) – Ceramic Measuring range -1 to 400 bar Accuracy ±0.2 % of fsv* Resolution 0.01 bar *Accuracy information applies only to instrument without probes connected
Differential pressure (external probe) – Piezoresistive Measuring range 0 to 2000 hPa Accuracy ±0.1 % of mv* Resolution 0.1 Pa (0638 1347) 0.01 hPa (0638 1547)
0.001 hPa (0638 1447)
0.1 hPa (0638 1847 / 0638 1647)
*Accuracy information applies only to instrument without probes connected
Differential pressure (internal sensor) – Piezoresistive Measuring range 0 to 2.5 hPa** Accuracy ±0.5 Pa (0 to 20 Pa) ±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa)
Resolution 0.1 Pa Static pressure 1000 hPa Overload 50 hPa Zeroing to 0.5 hPa **Sensor is not suitable for long-term measurements
Temperature – NTC Measuring range -40 to +150 °C Accuracy ±0.2 °C (-10 to +50 °C)* ±0.4 °C (Remaining Range)*
Resolution 0.1 °C *Accuracy information applies only to instrument without probes connected
Temperature – TC Type K (NiCr-Ni) Measuring range -200 to +1370 °C Accuracy ±0.4 °C (-100 to +200 °C)* ±1 °C (Remaining Range)*
Resolution 0.1 °C *Accuracy information applies only to instrument without probes connected
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