The Helios ETR is a versatile temperature controller designed for precise regulation within a broad measuring range of ‑50°C to +150°C. Suitable for both heating and cooling applications, the ETR allows full adjustment across the sensor range. It also includes an optional switch-off function that activates when airflow falls below a defined minimum threshold. Compatible with a range of Helios temperature sensors such as LTA, LTK, and LTR (available separately), this controller offers flexible integration for temperature-dependent control in HVAC systems.