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testo 521-3 - Differential pressure measuring instrument 0 to 2.5 hPa

Order-Nr. 0560 5213

Where to buy

Integrated temperature-compensated differential pressure sensor with accuracy of up to ± 0.5 Pa
Calculation of the flow velocity and the volume flow via Pitot tube (optional)
Direct zeroing of the display values of pressure probes
2 probe inputs for additional pressure and temperature probes

The testo 521-3 high precision differential pressure measuring instrument easily determines even the smallest differential pressures (up to +2.5 hPa). Its high accuracy and a resolution of 0.1 Pa make the instrument ideal for differential pressure measurements, in clean rooms, or for flue inspections.

Details

Product Description

Using the testo 521-3, even the smallest differential pressures, up to 250 Pa, are measured. High accuracy and a resolution of 0.1 Pa mean the instrument is ideal for differential pressure measurements in clean rooms.
When used with a pitot tube, the internal pressure sensor measures flow speeds in the range of 0.01 to 3937 fpm.

Delivery Scope

testo 521-3 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 1.0 InH₂O / 0 to 2.5 hPa
Accuracy	±0.0 InH₂O (0 to 0 InH₂O) / ±0.5 Pa (0 to 20 Pa) ±(0.0 InH₂O ±0.5 % of mv) (0.1 to 1 InH₂O) / ±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa)
Resolution	0.1 InH₂O / 0.1 Pa
Static pressure	400 InH₂O / 1000 hPa
Overload	20 InH₂O / 50 hPa
Zeroing	to 0.2 InH₂O / to 0.5 hPa

**Sensor is not suitable for long-term measurements

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)

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	-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; 1
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