Order Me In, once ordered this item will likely dispatch before the 22nd of September 2025, call 1300 737 871 (NZ 0800 737 871) to confirm.
The Testo 521-3 is a high precision differential pressure meter up to +2.5 hPa with a resolution of 0.1 Pa.
- Extremely accurate and can detect even the smallest pressure changes with an accuracy of up to +/- 0.5 Pa.
- Has two probe inputs for additional pressure and temperature probes.
- Can aslo measure flow speed when used with a pitot tubde.
Regular price
$1,939.70 AUD
+ GST
$2,133.67 AUD Inc. GST
$2,133.67 AUD Inc. GST




The Testo 521-3 is a high precision differential pressure meter up to +2.5 hPa with a resolution of 0.1 Pa. 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.
3 Year Warranty (2 Year Manufacturer Warranty + Bonus 1 Year Instrument Choice Warranty)
0560-5213 Features
- 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
Specifications
Measuring range (NTC)
|
-40 to +150 C
|
Accuracy
|
+/- 0.2 C (-10 to +50 C). Accuracy information applies only to instrument without probes connected
|
Resolution
|
0.1 C
|
Measuring range (Type K TC)
|
-200 to +1370 C
|
Accuracy
|
+/- 0.4 C (-100 to +200 C). Accuracy information applies only to instrument without probes connected
|
Resolution
|
0.1 C
|
Measuring range (internal sensor) - Piezoresistive
|
0 to 1.0 InHO / 0 to 2.5 hPa (Sensor is not suitable for long-term measurements)
|
Accuracy
|
+/- 0.0 InHO (0 to 0 InHO) / +/- 0.5 Pa (0 to 20 Pa); +/- (0.0 InHO +/- 0.5 % of mv) (0.1 to 1 InHO) / +/- (0.5 Pa 0.5 % of mv) (20.1 to 250 Pa)
|
Resolution
|
0.1 InHO / 0.1 Pa
|
Static pressure
|
400 InHO / 1000 hPa
|
Overload
|
20 InHO / 50 hPa
|
Zeroing
|
to 0.2 InHO / to 0.5 hPa
|
Measuring range (external probe) - Piezoresistive
|
0 to 800 InHO / 0 to 2000 hPa
|
Accuracy
|
+/- 0.1 % of mv. Accuracy information applies only to instrument without probes connected
|
Resolution
|
0.1 InHO (0638 1347) / 0.1 Pa (0638 1347). 0.01 InHO (0638 1547) / 0.01 hPa (0638 1547). 0.001 InHO (0638 1447) / 0.001 hPa (0638 1447). 0.1 InHO (0638 1847 / 0638 1647) / 0.1 hPa (0638 1847 / 0638 1647)
|
Measuring range (external probe) - Ceramic
|
-15 to 5802 psi / -1 to 400 bar
|
Accuracy
|
+/- 0.2 % of full-scale value
|
Resolution
|
0.14 psi / 0.01 bar
|
Dimensions
|
9 x 3 x 2 in. / 219 x 68 x 50 mm
|
Operating temperature
|
0 to +50 C
|
Housing
|
ABS
|
Channels
|
2; 1
|
Measuring rate
|
0.04 sec
|
Connection
|
Hose
|
Battery type
|
9 V (6LR61)
|
Battery life
|
Continuous operation w/ internal pressure sensor
|
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
|
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