Tekmar Controls 519 Thermostat 320734-701 This unit features a high-visibility

This unit features a high-visibility 60-90 degree Fahrenheit scale designed with large-scale numerals to assist in monitoring setpoints in low-light or industrial environments

How does the AM-321 differ from the AM-322

Its take-apart construction allows contractors to access interior components for maintenance without removing the valve from the piping or pumping down the system

For an HVACR contractor

clearly marked as "S" for supply pressure and "O" for the output signal to the controlled equipment

Tekmar Controls 519 Thermostat 320734-701 This unit features a high-visibilityThe Tekmar Controls 519 Thermostat is a purpose built solution for precise radiant floor heating management in hydronic systems. This 24Vac 24Vdc one stage radiant heat thermostat utilizes advanced Pulse Width Modulation (PWM) technology to eliminate the temperature swings common in standard on off controls, ensuring consistent thermal mass stability. Engineered for versatility, it functions as a direct replacement for the legacy Tekmar 509 and