Bathology RB 321 Sauna Room Temperature Sensor Guard, 6" x 9"A sauna sensortampering cureby Bathology! Maintain consistent, accurate, and reproducible sauna heater performance with the RB 321 Sauna Room Temperature Sensor Guard. Designed to prevent accidental contact, obstruction, or intentional interference, this guard ensures the temperature sensor can operate as intended. The result: stable heater control, dependable sauna performance, and a safer, more reliable bathing environment.