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In this milestone 400th episode, we're joined by Andre Patenaude of Copeland to explain 8 critical sensors on CO2 refrigeration systems (video link to this seminar below). Andre breaks down the most critical CO2 refrigeration sensors found in supermarket systems, common failure modes, troubleshooting strategies, and how to prevent catastrophic system shutdowns, product loss, and compressor damage in transcritical CO2 systems. He also explains how technicians, service managers, and contractors can improve reliability through proactive monitoring, redundancy strategies, trend analysis, and smarter control logic. Thank you for listening, following and helping us reach 400 episodes! Check out all of our past episodes and follow the Refrigeration Mentor Podcast on Apple, Spotify and YouTube here.

In this episode, we cover:

(02:27) Why Critical Sensors Matter in CO2 Refrigeration

(08:54) Booster System

(13:19) Gas Cooler Outlet Temp

(23:31) Mitigation Strategies

(31:24) Low Ambient Bypass and T2 Sensor

(37:30) Drop Leg Pressure Transducer

(41:14) Fan Modulation Chain Reaction

(43:01) P1 Transducer Failover Options

(45:46) Proactive P1 Calibration Checks

(47:29) P2 Flash Tank Pressure Basics

(51:38) Suction Group Transducer Backup

(53:54) Oil Level Sensors

(57:09) Adiabatic Pre Cool Sensor 7A

(01:01:46) Ambient Sensor 7B Water Control

(01:10:27) Dry Gas Cooler TD Sensor

Helpful Links & Resources:

VIDEO: Watch this seminar on the Refrigeration Mentor YouTube Channel

GUIDE: Critical Sensors for CO2 Transcritical Systems Guidance (NASRC)

Copeland Website

Andre Patenaude on LinkedIn