£152.50

About as cheap as it gets — within 5% of the all-time low it hit 3 months ago.

£153 today · all-time low £145 (Jul 2026) · usually the usual

GUNSON Gunson G4125 Gastester Digital CO Measurement Tool

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Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 41 days · 41 data points (no recent data)

Historical
Generating forecast…
£162.56 £143.71 £147.82 £151.93 £156.05 £160.16 £164.27 19 July 2026 29 July 2026 08 August 2026 18 August 2026 28 August 2026
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G4125

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Price Distribution

Price distribution over 41 days • 4 price levels

Days at Price
Current Price
1 day 38 days · current 1 day 1 day 0 10 19 29 38 £145 £153 £160 £163 Days at Price

Price Analysis

Most common price: £153 (38 days, 92.7%)

Price range: £145 - £163

Price levels: 4 different prices over 41 days

Description
The Gunson G4125 Gastester is a professional digital tool designed for the testing and setting of all carburettors and petrol injection systems. Whether you are working with petrol, leaded, or unleaded fuels, this instrument provides a simple and inexpensive method to ensure the correct petrol/air mixture is being dispensed. Developed by a British tool company based in Warwickshire, United Kingdom, Gunson Tools delivers quality products that offer real value for money. This device is an essential diagnostic aid for maintaining engine efficiency and ensuring proper fuel combustion across various vehicle types.

Key Features

The Gunson G4125 Gastester provides accurate CO measurements to within 0.5% at temperatures between 15-25 degrees Celsius.

This digital instrument is designed for ease of use and includes easy to follow instructions for setting carburettors.

The device features a durable design with no moving parts to wear out and requires no filters to change.

The Gastester instrument calibrates in air to ensure reliable performance during testing.

Gunson tools are responsibly sourced from trusted ethical partners and include products from their own UK manufacturing base.

Product Specifications
Brand
GUNSON
Model
G4125
ASIN
B002XF1VW6
Category
Automotive > Car Parts > Exhaust & Exhaust Systems > Catalytic Converters
Domain
Amazon UK
Release Date
08 September 2021
Listed Since
01 January 2011

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