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

Order-Nr.  0560 5213

  • 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.

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
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

*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)

*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; 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

Differential pressure probes

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

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

Pressure Probe Accessories

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

Additional accessories and Spare parts

Software and Accessories

RS232 cable

Order Number: 0409 0178

Transport Case

TopSafe (protective case)

Order Number: 0516 0446