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

The high-precision testo 521-2 differential pressure measuring instrument is ideal for accurate differential pressure measurements in air conditioning and ventilation technology, for instance for pressure drop on filters, checking fans and extractors or for Pitot tube measurements.

Differential pressure measuring instrument 0 to 2.5 hPa

Ideal for checking pressure in sensitive industrial processes: the testo 526-1 high-precision differential pressure measuring instrument with a measuring accuracy of &plusmn; 0.1% of final value. It also has two probe inputs for additional pressure and temperature probes.

The testo 526-2 high-precision differential pressure measuring instrument is ideally suited for checking pressure in sensitive industrial processes, thanks to a measuring accuracy of &plusmn; 0.05% of final value. Two additional pressure and temperature probes can also be attached.

High pressure probe, refrigerant-proof stainless steel, up to 30 bar

High pressure probe, refrigerant-proof stainless steel, up t...

HVAC Contractors

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Measuring range	-1 to +30 bar
Accuracy	±1 % of fsv
Overload rel. (low pressure)	120 bar

Operating temperature	-40 to +100 °C
Zeroing	0.3 bar

High pressure probe, refrigerant-proof stainless steel, up t...

High pressure probe, refrigerant-proof stainless steel, up t...

Pressure measurement

General technical data