Daikin-McQuay 070312401 Temperature Sensor

The Daikin-McQuay 070312401 Temperature Sensor is a critical OEM replacement part designed for high-precision thermal monitoring within commercial HVAC systems. This robust sensing assembly features a 6-inch stainless steel probe and an extended 30-foot shielded cable, providing the necessary reach and signal integrity for large-scale air handlers, chillers, and MicroTech control systems. Engineered to replace the legacy 703124B-01, this NTC thermistor operates with a specific resistance curve—typically 10K Ohm or 3K Ohm depending on the application series—to deliver real-time data to the BAS (Building Automation System). Its durable construction ensures accurate discharge air temperature or return air sensing in high-static environments. For technicians servicing McQuay RAH or RDS series units, this genuine Daikin factory part ensures seamless integration with existing terminal blocks and controller inputs without the calibration drift common in universal aftermarket alternatives. Using genuine HVAC sensors like the 070312401 is essential for maintaining tight setpoint control and preventing compressor short-cycling or coil icing.

Key Benefits

• Precise Thermal Tracking: The 6-inch sensing element provides rapid response times for accurate HVAC automation and unit protection.
• Extended Installation Reach: A 30-foot factory cable allows for flexible placement in deep duct runs or remote evaporator coils.
• OEM Compatibility: Specifically engineered for Daikin-McQuay MicroTech II and III controllers, ensuring plug-and-play communication.
• Industrial Durability: Built to withstand the constant vibration and moisture levels found in chiller and AHU environments.

Common Questions

What is the resistance value for this Daikin sensor?
The 070312401 is a standard thermal thermistor designed to match the specific lookup tables used in McQuay and Daikin Applied controllers. Refer to your unit’s service manual for the temperature-to-resistance (Ohm) chart.

Can this sensor be used for water temperature sensing?
While the 6-inch probe is durable, it is primarily designed as an air temperature sensor. For immersion applications, ensure the use of a compatible thermowell to prevent direct fluid contact with the probe housing.

Does this replace the 703124B-01 model?
Yes, the 070312401 is the direct factory replacement for the older 703124B-01 part number, maintaining the same form factor and electrical characteristics.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.