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

Order-Nr.  0560 5210

  • 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.

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
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)*

32.7 °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)*

34 °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 / 0 to 2000 hPa

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

-14 to 5802 psi / -1 to 400 bar

Accuracy

±0.2 % of full-scale value*

Resolution

0.10 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

Differential pressure probes

Meas.Range 0 to + 14.5 psi

Order Number: 0638 1647

Differential Pressure

Measuring range

0 to +400 InH₂O / 0 to +1000 hPa

Accuracy

±0 InH₂O (0 to +200 InH₂O) / ±1 hPa (0 to +200 hPa)

±0.5 % of mv (+80 to +1000 InH₂O) / ±0.5 % of mv (+200 to +1000 hPa)

Resolution

0.1 InH₂O / 0.1 hPa

Overload

800 InH₂O / 2000 hPa

Pitot tubes

Temperature - Type K TC

Measuring range

32.0° to 1112.0 °F / 0 to +600 °C

Temperature - Type K TC

Measuring range

32 to +1112 °F / 0 to +600 °C

Temperature - Type K TC

Measuring range

32.0° to 1112.0 °F / 0 to +600 °C

Pressure Probe

Differential Pressure

Measuring range

0 to +0 InH₂O / 0 to +100 Pa

Accuracy

±(0.0 InH₂O ±0.5 % of mv) / ±(0.3 Pa ±0.5 % of mv)

Resolution

0.1 InH₂O / 0.1 Pa

Overload

20 InH₂O / 50 hPa

Differential Pressure

Measuring range

0 to +4 InH₂O / 0 to +10 hPa

Accuracy

±0.01 InH₂O / ±0.03 hPa

Resolution

0.001 InH₂O / 0.001 hPa

Overload

20 InH₂O / 50 hPa

Differential Pressure

Measuring range

0 to +40 InH₂O / 0 to +100 hPa

Accuracy

±0.0 InH₂O (0 to +8 InH₂O) / ±0.1 hPa (0 to +20 hPa)

±0.5 % of mv (+8 to +40 InH₂O) / ±0.5 % of mv (+20 to +100 hPa)

Resolution

0.01 InH₂O / 0.01 hPa

Overload

120 InH₂O / 300 hPa

Absolute Pressure

Measuring range

0 to +800 InH₂O / 0 to +2000 hPa

Accuracy

±2 InH₂O / ±5 hPa

Overload

1600 InH₂O / 4000 hPa

Relative pressure probe

Pressure measurement

Measuring range

-14 to +145 psi / -1 to +10 bar

Accuracy

±1 % of full-scale value

Overload rel. (low pressure)

363 psi / 25 bar

Pressure measurement

Measuring range

-14 to +435 psi / -1 to +30 bar

Accuracy

±1 % of full-scale value

Overload rel. (low pressure)

1740 psi / 120 bar