AUTOOL PT520 Digital Manometer, -100 to 200 kPa

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Product guide

AUTOOL PT520 Digital Manometer, -100 to 200 kPa

The AUTOOL PT520 is a digital differential-pressure manometer for gas and HVAC measurement, with a stated range of -100 to 200 kPa and ±0.3% FS accuracy. Its multiple selectable units, backlit display and data storage support varied readings, though customer feedback raises concerns about sensitivity to small pressure differences.

At a glance

Switch between 10 listed pressure units for different measurement conventions.
Data lock helps keep a reading visible, while the device can store 29 sets of data.
Backlit LCD and top illumination are intended to aid viewing in low light.
The stated automatic shut-off activates after 10 minutes with no pressure and no operation.

Price

£50.99Save 15%

Reference price: ~~£59.99~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Ten selectable units and a data-storage function provide flexibility for recording readings.
Backlighting, top illumination and a data-lock key support reading the display in dim conditions or when a value needs to remain visible.

Cons

Customer feedback reports mixed sensitivity, including difficulty reading small pressure differences.

Technical specifications

14 specifications

Identity
Brand	AUTOOL
Model	PT520

Measurement
Measurement range	-100 to 200 kPa / -14.5 to 29 psi
Stated accuracy	±0.3% FS
Selectable units	inH2O, mbar, psi, kPa, hPa, inHg, mmHg, kg/cm2, mmH20, and Torr.
Stored readings	29 sets of data

Display and operation
Display	Large Backlit LCD
Lighting	Top Illumination
Automatic shut-off	10 minutes of no pressure, no operation.
Zeroing	Press and hold the zero key for 5 seconds for atmospheric pressure calibration.

Dimensions and installation
Dimensions listed	16.5 x 7.4 x 3.3 centimetres
Weight listed	500 Grams
Thread type	1/4" NPT

Materials and protection
Material listed	Acrylonitrile Butadiene Styrene (ABS)

What to know before buying

Listing details to confirm

The stated ±0.3% FS accuracy is a listing claim, not independent verification. Customer feedback is mixed on accuracy and HVAC suitability, so buyers relying on very small pressure differences or HVAC readings should consider these reports alongside their measurement requirements. The listing also claims a three-year warranty and lifetime technical support, but coverage terms are not detailed.

What’s in the box

Included

Manometer
User manual

Who is it for?

A good fit for

HVAC or gas-pressure users whose required range fits -100 to 200 kPa and who can work with the stated sensitivity caveat.
Users who need pressure readings in one of the listed units and want to store or hold displayed values.

Less suited to

Users who require confirmed performance on very small pressure differences or need independently verified accuracy for critical measurements.

AUTOOL PT520 Digital Manometer, -100 to 200 kPa · photo 2 — Additional product photo 2

Customer reviews on Amazon

4 / 5 · 71 ratings

5 stars63%63%
4 stars9%9%
3 stars8%8%
2 stars8%8%
1 star12%12%

Customer feedback describes quick, accurate measurements and positive impressions of quality, but reports are mixed on accuracy and HVAC suitability. Some customers say it does not detect small pressure differences. For HVAC work or measurements near the instrument's sensitivity limits, these reports matter even though the listing states ±0.3% FS accuracy. Ratings are generally favourable but include a spread of lower-star ratings, so they do not settle performance for a particular task.

Positive themes

Customer feedback describes the device as quick and accurate, with positive comments about quality.

Negative themes

Some customers report that it cannot read small pressure differences.

Mixed feedback

Feedback is mixed on accuracy and suitability for HVAC measurements.

Frequently asked questions

What pressure range does the PT520 list?

The listing states -100 to 200 kPa / -14.5 to 29 psi. Confirm that this range and the stated accuracy meet your application.

Which measurement units are available?

The listing names inH2O, mbar, psi, kPa, hPa, inHg, mmHg, kg/cm2, mmH20, and Torr.

Can it save or hold readings?

The listing says it can store 29 sets of data and includes a data-lock key to hold a value on screen.

Is it suitable for small HVAC pressure differences?

Customer feedback is mixed on HVAC suitability and includes reports that the device may not read small pressure differences. Match it to the sensitivity your work requires.