Testo Coolant tester 560i Set
You might not use a thermometer often, but it's very handy to have your own once the need arises. There's no cord to restrict you, just make sure you've charged the battery.
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From Amazon
Testo 560i App-Operated Refrigerant Scale Set – Reloading Scale with Valve and Carrying Bag – Incl. App-Operation and Compatibility with Digital Manifolds
£491.35
AC One
Testo 560i Digital Refrigerant Scale with Charging Valve
£359.99
Conrad Electronic
Coolant tester testo 560i Set
£448.82
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