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testo 521-1 - Differential pressure measuring instrument 0 to 100 hPa (accuracy ±0.2% of f.v.)

Order-Nr. 0560 5210

Where to buy

Integrated differential pressure sensor with an accuracy of 0.2 % of f.v.
Calculation of the flow velocity and the volume flow via Pitot tube (optional)
Multi-point and timed mean calculation
2 probe inputs for additional pressure and temperature probes

The high precision testo 521-1 differential pressure measuring instrument is ideal for accurate differential pressure measurements in air conditioning and ventilation technology, for pressure drop on filters, for instance, for checking fans and extractors, or for pitot tube measurements.

Details

Product Description

The highly accurate differential pressure meter, testo 521, with an internal pressure sensor from 0 to 100 hPa, is ideal for pitot tube measurements in the range of 5 to 100 m/s. The testo 521 is available in 2 accuracy classes, the testo 521-1 with an internal pressure sensor with Class 0.2, and the testo 521-2 with an internal pressure sensor with Class 0.1.

In the case of velocity speeds in the range of 1 to 12 m/s, you can carry out accurate measurements using the 100 Pa probe, which can be attached externally.

The measurement data can be saved according to location, and analyzed on your PC, or printed on site on your testo printer.

Delivery Scope

testo 521-1 differential pressure measuring instrument, including calibration protocol and batteries

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Technical Data

Temperature - NTC
Measuring range	-40° to 302 °F / -40 to +150 °C
Accuracy	±0.4 °F (14° to 122 °F)* / ±0.2 °C (-10 to +50 °C)* ±0.7 °F (Remaining Range)* / ±0.4 °C (Remaining Range)*
Resolution	0.1 °F / 0.1 °C

Temperature - NTC

Measuring range

-40° to 302 °F / -40 to +150 °C

Accuracy

±0.4 °F (14° to 122 °F)* / ±0.2 °C (-10 to +50 °C)*

±0.7 °F (Remaining Range)* / ±0.4 °C (Remaining Range)*

Resolution

0.1 °F / 0.1 °C

*Accuracy information applies only to instrument without probes connected

Temperature - Type K TC
Measuring range	-328° to 2498 °F / -200 to +1370 °C
Accuracy	±0.7 °F (-148° to 392 °F)* / ±0.4 °C (-100 to +200 °C)* ±2 °F Remaining Range* / ±1 °C Remaining Range*
Resolution	0.1 °F / 0.1 °C

Temperature - Type K TC

Measuring range

-328° to 2498 °F / -200 to +1370 °C

Accuracy

±0.7 °F (-148° to 392 °F)* / ±0.4 °C (-100 to +200 °C)*

±2 °F Remaining Range* / ±1 °C Remaining Range*

Resolution

0.1 °F / 0.1 °C

*Accuracy information applies only to instrument without probes connected

Differential pressure (internal sensor) - Piezoresistive
Measuring range	0 to 40 InH₂O / 0 to 100 hPa
Accuracy	±0.2 % of full-scale value
Resolution	0.01 InH₂O / 0.01 hPa
Static pressure	400 InH₂O (abs) / 1000 hPa (abs)
Overload	120 InH₂O / 300 hPa
Zeroing	to 1.0 InH₂O / to 2.5 hPa

Differential pressure (external probe) - Piezoresistive
Measuring range	0 to 800 InH₂O
Accuracy	±0.1 % of mv*
Resolution	0.1 InH₂O (0638 1347) / 0.1 Pa (0638 1347) 0.01 InH₂O (0638 1547) / 0.01 hPa (0638 1547) 0.001 InH₂O (0638 1447) / 0.001 hPa (0638 1447) 0.1 InH₂O (0638 1847 / 0638 1647) / 0.1 hPa (0638 1847 / 0638 1647)

Differential pressure (external probe) - Piezoresistive

Measuring range

0 to 800 InH₂O

Accuracy

±0.1 % of mv*

Resolution

0.1 InH₂O (0638 1347) / 0.1 Pa (0638 1347)

0.01 InH₂O (0638 1547) / 0.01 hPa (0638 1547)

0.001 InH₂O (0638 1447) / 0.001 hPa (0638 1447)

0.1 InH₂O (0638 1847 / 0638 1647) / 0.1 hPa (0638 1847 / 0638 1647)

*Accuracy information applies only to instrument without probes connected

Differential pressure (external probe) - Ceramic
Measuring range	-15 to 5802 psi / -1 to 400 bar
Accuracy	±0.2 % of full-scale value*
Resolution	0.14 psi / 0.01 bar

*Accuracy information applies only to instrument without probes connected

General technical data
Dimensions	9 x 3 x 2 in. / 219 x 68 x 50 mm
Operating temperature	32° to 122 °F / 0 to +50 °C
Housing	ABS
Channels	2 external; 1 internal
Measuring rate	0.04 sec
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	-4° to 158 °F / -20 to +70 °C
Weight	11 oz. / 300 g