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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.

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

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Ideal for checking pressure in sensitive industrial processes, the testo 526-1 high precision differential pressure measuring instrument&nbsp;has a measuring accuracy of &plusmn;0.1% of the 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 the final value. Two additional pressure and temperature probes can be attached.

Precision pressure probe, 100 Pa, measures differential pressure and velocity (with Pitot tube)

Operating temperature	32.0° to 122.0 °F / 0 to +50 °C
Static pressure	40 InH₂O / 100 hPa
Zeroing	8 InH₂O / 20 hPa

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

Precision pressure probe, 100 Pa - Pressure probe, 100 Pa (differential pressure)

Precision pressure probe, 100 Pa - Pressure probe, 100 Pa (differential pressure)

General technical data

Differential Pressure