Soapy water

Inficon TEK-Mate 705-202-G1 Refrigerant Leak Detector, R22, R410A, R134A Detects

EZ-JECT™ COMPLETE

FLUORESCENT LEAK DETECTION KIT
SPE-HVLEZE

Bacharach H-10 PRO Ultra-Sensitive Universal Refrigerant Leak Detector
Model: H-10 PRO

MA-Line MA-600CFA - Digital Clamp-On Meter with Temperature Measuring Feature