AUTOOL PT503 Digital Manometer, -101 to 200 kPa

The AUTOOL PT503 is a digital manometer for pressure checks, with a stated range of -101 to 200 kPa and six selectable measurement units. Its backlit LCD and data-hold function are useful for reading and recording measurements on site, while the required atmospheric-pressure zeroing makes start-up conditions important.

At a glance

Switch between six stated pressure units without manual conversion.
Data hold locks the reading for easier viewing.
Backlit LCD is intended to aid viewing in low light.
The listing describes measurement of positive, negative and differential pressure.

Price

£36.54Save 15%

Reference price: ~~£42.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Six measurement units cover common pressure scales in one instrument.
Backlight and data hold can make readings easier to view during on-site work.
The listing states both positive and negative pressure measurement as well as differential pressure.

Technical specifications

10 specifications

Identity
Brand	AUTOOL
Model	PT503

Measurement
Measuring range	-101 to 200 kPa / -14.6 to 29 psi
Accuracy	±0.5% FS
Measurement units	psi, kPa, mbar, bar, inHg, mmHg

Display and operation
Screen technology listed	LCD
Data hold	Data lock function
Auto shut-off	5 minutes of no pressure, no operation

Dimensions and installation
Dimensions listed	7 x 6.5 x 11 centimetres

Materials and protection
Material listed	Acrylonitrile Butadiene Styrene (ABS)

What to know before buying

Power on and allow atmospheric-pressure auto-zero before measuring. The listing warns that starting the device under pressure can lead to inaccurate readings.

Listing details to confirm

The title and feature text claim a dual-port instrument and include 1 m of tubing, two AAA batteries and seven connectors, while the explicit contents list names only the manometer and user manual. Confirm the selected listing's package before purchase. The description also calls the housing drop-resistant without specifying a test or protection rating.

What’s in the box

ManometerIncluded
User manualIncluded
1 m of 1/8-inch inside diameter silicone tubingCheck selected pack
2 AAA batteriesCheck selected pack
7 connectorsCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

HVAC or gas-pressure checks where a handheld digital reading and selectable units are useful.
Users who need to hold a reading for easier viewing in low-light or on-site conditions.

Less suited to

Buyers who need confirmed accessory contents without checking the selected listing.
Measurements requiring accuracy or operating conditions beyond the listed range and ±0.5% FS claim.

AUTOOL PT503 Digital Manometer, -101 to 200 kPa · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.7 / 5 · 25 ratings

5 stars50%50%
4 stars15%15%
3 stars13%13%
2 stars0%0%
1 star22%22%

Aggregate ratings are mixed, with half in the five-star category but a substantial one-star share. That spread gives limited assurance about consistency. The available evidence does not explain the reasons behind the ratings, so buyers should judge the stated range, accuracy and zeroing requirements against their own work.

Frequently asked questions

What pressure range is listed for the AUTOOL PT503?

The listing gives -101 to 200 kPa / -14.6 to 29 psi, with stated accuracy of ±0.5% FS.

Which units can it display?

The listed choices are psi, kPa, mbar, bar, inHg and mmHg.

What should I do before taking a measurement?

The instructions say to power it on for atmospheric-pressure auto-zeroing. They warn that turning it on under pressure can lead to inaccurate measurements.

Are tubing, batteries and connectors confirmed in the box?

The feature text claims 1 m of silicone tubing, two AAA batteries and seven connectors, but the explicit contents list names only the manometer and user manual. Check the selected listing for the package details.