https://www.belimo.com/ca/shop/en_US/Sensors-Meters/Duct-Sensors-%28Air%29/01APS-50R-1/p?code=01APS-50R.1
01APS-50R.1 | Duct Sensors (Air) | Sensors / Meters | Belimo Canada Official Site
Differential pressure switch, 0.08...1.20 inch WC [20...300 Pa], Switch Multipack 45 pcs.
duct sensors air
https://belimo.dk/01aps-104
01APS-104
Differenstrykafbryder, 500...2500 Pa, Kontakt