For flow in HVAC systems, vehicles, machines, production plants and others

The flow-captor and vent-captor are compact, self-contained flow sensors that work according to a calorimetric principle. The principle allows for the creation of compact, reliable flow sensors with a price/performance ratio not possible with other physical flow-sensing principles. Especially at a low flow rate, no other sensing principle can achieve the high accuracy as the flow-captor. First engineered by weber Sensors more than 20 years ago, weber continues to pioneer sensors based on this principle.

Flow Captor

(meters and switches) for liquid and pasty media.

The 4120 flow-captor flow switch is simple to install via the 1/2 NPT threaded probe tip (also available in BSP). It provides both Absolute and Relative flow monitoring. The unit can provide an adjustable setpoint based on % of full flow or can be set to an actual velocity via the indexed “range” potentiometer. It also gives a flashing LED indication of setpoint position as well as a Green LED indication of Flow OK.

The 4120.81 MS 141 flow switch is a ruggedized, sealed version of the insertion flow-captor model 4120 above. This unit is housed in a stainless steel housing with screw on, gasketed front cover – excellent for harsh environments or outdoor use. They are powered with 120VAC and contain SPDT electromechanical Relays.

Vent Captor

Self-Contained Air Flow Sensors (meters and switches) for gaseous media.