# 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.

- [Original product page](https://bargainpostbox.co.uk/product/autool-pt503-digital-manometer)
- [View offer](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: AUTOOL
- Model: PT503
- Category: Tools & Garden > Hand Tools
- Price: 36.54 GBP
- Previous price: 42.99 GBP
- Discount: 15%
- Price checked: 2026-11-14T19:27:24.870Z
- Rating: 3.7 / 5
- Reviews: 25

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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 \(ABS\)

## Before you buy

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

## In the box

- Manometer (Included)
- User manual (Included)
- 1 m of 1/8-inch inside diameter silicone tubing (Check selected pack): Claimed in the feature text but absent from the explicit contents list. Check the selected listing.
- 2 AAA batteries (Check selected pack): Claimed in the feature text but absent from the explicit contents list. Check the selected listing.
- 7 connectors (Check selected pack): Claimed in the feature text but absent from the explicit contents list. Check the selected listing.

## 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.

## Customer feedback

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.

## Alternative options

- [PT530 Manometer Gas Pressure Tester -100 to 300Kpa Digital Dual-Port Fieldpiece Manometer HVAC 10 Units 7 Adapters, Data Locking & Storage with Magnetic Back and Backlit display](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- [Professional Manometer Gas Pressure Tester ±3Psi Measuring Range - HVAC Gauge With 12 Selectable Units, Differential Dual-Port Air Pressure Temperature Meter](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- [Ehdis Digital Manometer Air Pressure Meter Gas Gauge Reader with 32-bit MCU 24-bit ADC High Accuracy 12 Units Data Save or Hold](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- [PT520 Digital Manometer Air Pressure Gauge -100-200 KPa 0.1 Resolution air pressure 10 Units Differential Dual-Port HVAC Digital Manometer Gas Pressure Tester with Backlight LCD Display](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- [Digital Manometer Gas Pressure±30.00psi Differential Pressure with 11 Units \| 0.01 resolution, ±0.3% FSO accuracy. Dual-port. Large backlit LCD. Data logging. For HVAC, gas appliances, pneumatics.](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)
- [Digital Manometer for HVAC, Range -101~200Kpa, Accuracy ±0.5% FS \| Dif Mode, Data Hold, LCD Backlight Display, 6 Units Switchable, Included 7 Adapters](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)

## Add-ons

- [KATSU Tools 2 in 1 Hand Held Vacuum and Pressure Pump Tester Brake Bleeder \| Brake Fluid Bleeding Bleeder Kit, One Man Operation, for Car Motorcycle, Model 450823](https://bargainpostbox.co.uk/visit/autool-pt503-digital-manometer)

## Images

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 1](https://bargainpostbox.co.uk/i/pouCeJl9yCehPJtikbyQHPtTEZSqgap_-EIphrromy6xwf10i0_STvYppcOOjYxm2WZ_z0H0rTzCvQ9slZbKoO_5hbB1iljGYW7_sgBsuPM5LUWACnY4.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 2](https://bargainpostbox.co.uk/i/jDYWm2mqKvtn3AOgLcCpDDd8459RbLfEVEpz-4Zapsa246C6GpWyIf8RQ8MXeQkJReZDml4g393NsQWPVaar3LHFLnA2gI6ExZmK3LppOegP9WwVycPm.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 3](https://bargainpostbox.co.uk/i/9wR7PhE17PcMC0Cr5_DM9OjqbkCPMgMEBTTHvdnCuoFVylaqDyMeRXTjCheEhbmrWuvUAH3StQacEDg1tS0IY3-LkhfhXkLuzypphb2BmP-KBMyxMXHr.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 4](https://bargainpostbox.co.uk/i/BwAMoocCpBXf5IfEt8hlOff1sMMKkNjLe5gi6lwrf8HCBTEbcwVOfhHMMG2KMbZu5onhz994UqbuFuXEV9ihb8Dt55WxFrpvtNDRK3TnML9GGduqozpB.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 5](https://bargainpostbox.co.uk/i/Eck_vtSLLbQzmFLDWPvm2Pj_-0gABTcgW-tjo_8S67CokQ40sAuIsrKKh-7uE_0Am5iLYzgo30DWhNs6JjtS7eDkVH2Yg6RF8JQoC7c1gk9IujEzh339.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 6](https://bargainpostbox.co.uk/i/kWiKFq_vKfTHLenj1OHT31RlqUVyiv3FguQIDowWXAGGt41C2_UlBoqSjRZebg658awirEocPfnlLywP3tN5FowVK6r25j_dj5M2AyWqnDzI3nigY1_Z.jpg)

![AUTOOL PT503 Digital Manometer, -101 to 200 kPa — 7](https://bargainpostbox.co.uk/i/j6NWl-lmCtD1KCZGgEVUFtWnUDOKd7gLpL9Pb-opinQLZ7uaQ2GbD7-UqG1e3XoFNovakmzjmskxZTH6hVOFoxMgEJUsNG0ngiYjr6hzSyea2pZSxX4D.jpg)