Tekmar Controls 054 Temperature Unit

The Tekmar 054 Room Temperature Unit is a mission-critical 10K NTC thermistor sensor designed for precise indoor climate monitoring within a wide 40-100°F temperature range. This unit is the standard field replacement for the legacy 055 model, offering an expanded setpoint range for diverse hydronic and HVAC applications. Built with a durable PVC enclosure, the Tekmar 054 functions primarily as a resistance-based sensing device rather than a standalone thermostat switch, providing high-accuracy data to a central control system. It features an adjustable dial that allows for manual resident override or setpoint adjustment, and the internal jumper configuration permits the integration of a remote 10K sensor (such as the 071 or 072) for averaged or remote-area sensing. Specifically engineered for modern systems, this RTU temperature sensor is compatible with 370, 371, 367, and 368 series controls but is not intended for use with older 2K resistance platforms. For contractors, the unit supports seamless surface mounting or installation on a standard 2" x 4" electrical box using an optional adaptor plate.

• Precise 10K NTC Sensing: Utilizes a high-accuracy 10k ohm thermistor (at 77°F) to ensure consistent communication with central boiler and mixing controls.
• Adjustable Range Limiting: Includes physical limit pins to restrict the dial rotation, preventing end-user setpoint tampering in commercial or multi-family settings.
• Dual-Scale Flexibility: Comes standard with a Fahrenheit scale installed, but features a reversible Celsius scale (4 to 38°C) on the reverse side for international or specialized applications.
• Remote Sensor Integration: Allows for the connection of an external 10K sensor; cutting the internal jumper enables the control to prioritize or average readings from the remote location.
• Simplified Wiring: Designed for standard 18 AWG two-conductor wiring, making it a straightforward drop-in replacement for existing HVAC control loops.

Is the Tekmar 054 compatible with older 2K resistance systems?
No, this unit is a 10K NTC sensor and will not function correctly with legacy controls requiring a 2K ohm resistance signal. Verify your controller’s sensor requirements before installation.

Can I mount this directly to a junction box?
While the unit is designed for surface mounting, it can be mounted to a 2" x 4" electrical box if paired with the Tekmar 007 Adaptor Plate.

How do I test if the sensor is functioning correctly?
Use a multimeter to measure the resistance at the RTU terminals. At 77°F (25°C), the sensor should read approximately 10,000 ohms. A significantly higher or lower reading usually indicates a wiring short or a failed thermistor.

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.