While the barbed fittings are optimized for 1/4" OD polytubing

Universal Refrigerant Compatibility: Rated for use with CFC

a multi-stage specific control is required

applying a high-quality thermal compound to the probe tip before inserting it into the thermowell is highly recommended

Look for the distinctive green label and the 10M6301 manufacturer part number stamped on the body to ensure you are installing a genuine OEM component

Copeland 918-0518-01 Heater 30067439-890 While the barbed fittings areThe Copeland 918 0518 01 Crankcase Heater is a critical component for maintaining oil temperature and preventing refrigerant migration during compressor off cycles. This insertion type heater is engineered for a precise fit in 4, 6, and 8 cylinder deep sump compressors, including Copelametic and Discus models. Operating at 240 Volts and delivering 200 Watts of heating power, it ensures that technical lubricants remain at the optimal viscosity required