The new captor P-R-O 50 is for applications requiring RELATIVE measurement and set-point of flow rate. This means that the actual velocity of the flow or the quantitative measurement in GPM is not known and is not important. What is important is that the set-point can be set as a "percentage of" or "relative to" the full flow rate. No other flow sensor could do it this simply or effectively.

• Compact electronic unit with no moving parts
• No adjustment or calibration needed
• Maintenance free
• Fail Safe Normally Open switch
• Economical Protection even for the most critical cooling systems
• Designed with the OEM in mind

4114.73 flow captor is an AC switch with adjustable setpoint and Normall Open operation. Excellent for applications requiring AC power and where space is minimal. Adjustable from 2 to 200 cm/s trip point.

The 4120 flow-captor 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.  

4120.81 MS 141 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.

4120-52-53M is a ruggedized version of the 4120 DC powered unit and also comes in a stainless steel housing with screw on, gasketed cover. It can be provided with an AC Thyristor output in Normally Open or Normally Closed configuration.