Ranco 1309007-044 Sensor

The Ranco 1309007-044 Sensor is a high-precision NTC thermistor replacement designed specifically for the Ranco ETC electronic temperature control series. This 1/4" diameter by 2" long probe features a secondary reference resistance of 30,000 ohms at 77°F, ensuring accurate thermal feedback for mission-critical refrigeration and HVAC applications. The 8-foot #22 AWG cable provides ample lead length for standard installations, though the signal can be extended up to 400 feet using similar gauge conductors without significant voltage drop or signal degradation.

Engineered for versatility, the 1309007-044 supports an operating range from -30°F to 220°F. For contractors managing temperature averaging in larger walk-ins or ducts, these sensors can be wired in series-parallel configurations to provide a mean temperature input to a single ETC controller. While the probe is suitable for air and surface sensing, it is recommended to use a thermal well for any liquid immersion requirements to maintain the integrity of the thermistor element. This OEM-grade component is the standard for maintaining refrigeration temperature control setpoints in specialized ETC-111000 and ETC-211000 series units.

• Broad Operating Range: Rated for temperatures between -30°F and 220°F, making it suitable for both freezer and boiler applications.
• Flexible Installation: The 8-foot lead is factory-calibrated for Ranco ETC series controllers but can be extended up to 400 feet for remote monitoring.
• Averaging Capability: Compatible with series-parallel wiring for accurate duct averaging or large space sensing.
• Standardized Specs: 30K ohm resistance at 77°F ensures immediate compatibility with existing ETC digital controllers without recalibration.

Can I use this sensor in liquid?
Direct submersion is not recommended. For liquid applications, the probe should be installed inside a dry bulb well to protect the sensing element from moisture-induced drift.

What does an 'EP' error code mean on my Ranco ETC?
An EP code typically indicates a probe error, meaning the sensor is open, shorted, or sensing a temperature outside the -30°F to 220°F range. Testing the 30K ohm thermistor resistance vs. temperature is the standard diagnostic step.

Does polarity matter when wiring the replacement?
No, the 1309007-044 sensor is not polarity-sensitive. You can connect either lead to the input terminals on the ETC control board.

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.