Differential Pressure Switches
Series 908 — Adjustable differential switching for liquids and gases
For process and heating circuits, the 908 offers adjustable switching in robust mbar ranges (40–200 mbar; 150–1,000 mbar) and supports liquids and gases—including aggressive media when specified. Brass G 1/8 pressure connections and diaphragm options (EPDM / NBR / FKM / silicone) align materials to your medium and temperature.
Maximum operating pressure: 10 bar
Burst pressure: 20bar
Series 911.82 — Factory‑set precision for HVAC air monitoring
Designed for ventilation and building services, the 911.82 is factory‑set within 20–1,000 Pa and built for air and other non‑combustible, non‑aggressive gases.
Fit for filter status, duct flow, frost protection and fan overheat prevention.
Series 930 Climair® — Adjustable, tool‑free setpoint with broad Pa ranges
Our iconic 930 Climair® lets you dial in the setpoint without a manometer using a scaled knob, with overlapping variants covering 20 Pa to 5,000 Pa for air and other non‑combustible, non‑aggressive gases.
Typical uses include filter monitoring, industrial cooling air, duct flow supervision, damper and fire‑flap control, and frost protection, with an IP54 transparent cover as standard and ATEX, UL, DVGW and IP65 type‑tested options available.
