Differential pressure measuring instrument - testo 521
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Differential pressure measuring instrument - testo 521 - 1

Differential pressure measuring instrument 521 - Precise Pitot tube Temperature-compensated differential pressure sensor in Additional 2 probe inputs for the connection of further probes for the measurement of pressure and temperature Direct calculation of flow velocity and volume flow Direct zeroing of display value from pressure probes Display of Hold-, max. and min. values Easy data storage by measurement site as well as analysis, archiving and documentation via optional PC software Point and timed mean value calculation testo 521-1/-2/-3 are highly accurate differential pressure measuring instruments with an internal sensor. The versionstesto 521-1 and testo 521-2 both have ameasuring range from 0 to 100 hPa, however they are available in two accuracy classes: - testo 521-1 : accuracy 0.2 % of final value - testo 521-2: accuracy 0.1 % of final value testo 521-1 and testo 521-2 are optimally suited to checks on extraction systems and ventilators and for the monitoring of pressure drop at filters. In combination with a Pitot tube, the internal sensor measures flow velocities from 5 to 100 m/s. The instrument additionally has two probe inputs for the connection of further probes for the measurement of pressure and temperature. A large selection of probes is available for this purpose. testo 521-3 has a measuring range of 0 to 2.5 hPa and records even the smallest pressure differences without difficulty. Its high accuracy and a resolution of 0.1 Pa make it ideal for differential pressure measurements in cleanrooms. In combination with the Pitot tube, the internal sensor measures flow velocities from 1 to 20 m/s. The testo 521-3 is also equipped with two probe inputs for the connection of further probes for the measurement of

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Differential pressure measuring instrument - testo 521 - 2

Differential pressure measuring instrument andcalibration protocol included and calibration protocol Included testo 521-3 (0 to 2.5hPa) battery and calibration protocol Included testo 521-1/-2 with internal sensor 0 to 100 hPa / 0.1 % testo 521-1/-2 is equipped for accurate differential pressure measurements in the VAC sector, for example pressure drops in filters, inspections on ventilators and suction systems. Use testo 521-1/-2 for Pitot tube measurements in testo 521-3 with internal sensor 0 to 2.5 hPa Even the smallest differential pressures up to 2.5 hPa are measured using testo...

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Differential pressure measuring instrument - testo 521 - 3

Further advantages testo 521 Wide selection of probes The differential pressure sensor is integrated into testo 521. Up to two additional probes can be connected through user-defined probe sockets. Differential pressure probes to 2000 hPa Absolute pressure probes to 2000 hPa Relative pressure probes to 400 bar Temperature probes from -200 to +1250 °C Probes for measuring current/voltage Advantages while measuring • The short-text menu facilitates the handling vastly. • Two measurement channels are displayed in the large two-lined LED-display; switching between the calculated measurement...

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Differential pressure measuring instrument - testo 521 - 4

Technical data General technical data testo 521-1/-2/-3 Sensor types pressure sensor Piezoresistive pressure pressure probes Ceramic sensor pressure probes ^Accuracy information applies only to instrument without probes connected **Sensor is not suitable for long-term measurements

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Differential pressure measuring instrument - testo 521 - 5

Additional accessories and spare parts Part no. Calibration Certificates Probe accessories

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Differential pressure measuring instrument - testo 521 - 6

Probe type Differential pressure probe Absolute pressure probe Pressure probe, 2000 hPa, measures absolute pressure, in robust metal housing with Impact protection, Incl. magnet for fast attachment Steckkopf, Anschlussleitung 0430 0143 Oder 0430 0145 erforderlich

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Differential pressure measuring instrument - testo 521 - 7

Probe type Relative pressure probe (media compatible) Low pressure probe, refrigerant-proof High pressure probe, High pressure probe, High pressure probe, High pressure probe, Oper. temp.: -40 to +100 °C; 0 to +70 °C (compensated) Conn.: Plug-in head, connection cable 0409 0202 required Probe type Oper. temp. Pitot tubes Pitot tube, 300 mm long, 0 4 mm, stainless steel, measures flow speed Pitot tube, 500 mm long, 0 7 mm, stainless steel, measures flow speed In conjunction with 0638 1347 / 0638 1447/0638 1547 pressure probes or testo 521, with Internal sensor Pitot tube, 350 mm long, 0 7...

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Differential pressure measuring instrument - testo 521 - 8

testo-521-P08 10.08.2012 08:12 Seite 8 testo 521 We measure it. Probes Probe type Measuring range Accuracy t99 Part no. -200 to +300 °C Class 2* 3s 0604 0194 -200 to +600 °C Class 1* 1s 0604 0493 -200 to +600 °C Class 1* 25 s 0604 9993 -200 to +600 °C Class 1* 1s 0604 9794 -200 to +1100 °C Class 1* 1s 0604 0593 -200 to +400 °C Class 1* 3s 0604 0293 -200 to +400 °C Class A (-100 to +400 °C) Class B (remaining range) 20 s 0604 0273 -200 to +400 °C Dimensions Probe shaft/probe shaft tip ±(0.03 °C +0.05% of mv) (0 to +100 °C) ±(0.06 °C +0.1% of mv) (remaining range) 30 s 0628 0015 -100 to +265...

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