ORANGEBURG, N.Y., Oct. 19, 2016 — Optical Sensor Switches from Aalborg Instruments & Controls Inc. noninvasively detect high- or low-flow rates that can damage equipment and processes. The devices are ideal for OEM applications and consist of a transmitter and receiver. They signal a cut-off valve, alarm or other device when the float passes above or below the desired setting. These versatile optical sensor switches can be used with the company’s P, S and T rotameters. The Hi-Lo Switch contains two sets of enhanced, self-contained mini-slim photoelectric sensors located on two solid carriers. The Hi-Lo can also be used in conjunction with a control relay to power alternate equipment or monitoring devices.