HVAC Diagnostic & Testing Tools for Refrigeration Engineers

Refrigerant identifiers, smoke machines, sight glasses, thermometers, and diagnostic equipment for HVAC system troubleshooting, commissioning, and quality assurance. Mastercool diagnostic tools in stock with same-day UK dispatch and trade pricing.

Refrigerant Identifiers

The Mastercool MINI R1234yf Refrigerant Identifier and MINI R134a Refrigerant Identifier confirm refrigerant purity and identify contamination before servicing — essential for protecting recovery equipment and ensuring correct refrigerant handling. Refrigerant identification is particularly important when servicing older systems where refrigerant type may be unknown or where cross-contamination is suspected.

Diagnostic Smoke Machines

Mastercool diagnostic smoke machines for EVAP system leak testing and intake system diagnostics on automotive and commercial vehicle applications. Available in standard EVAP, HD truck, and turbo/intake configurations. Accessories include EVAP test port adapters, Schrader valve removers, and diffuser assemblies for different test applications.

Visual Inspection & Sight Glasses

Mastercool R1234yf visual inspection sight glasses with manual and quick-coupler options for checking refrigerant flow and moisture content in next-generation AC systems. Sight glasses allow visual confirmation of refrigerant state during charging and system operation.

Temperature Measurement

Mastercool dual-temp infrared thermometer for non-contact surface temperature measurement on condensers, evaporators, and pipework. K-type piercing temperature probe for direct contact measurement on pipe surfaces and refrigerant lines. Accurate temperature measurement is essential for superheat and subcooling calculations during commissioning. Browse all thermometers and temperature tools.

Trade accounts available — call 0161 775 1190 for volume pricing on diagnostic tools.