The OS-4 ozone sensor features a thermostat to control ozone generators or other equipment with advanced monitoring and controls. It accurately measures ozone from .03 – 20 ppm (parts per million) and features a .1 ppm safety limit light. It includes set-point controlled relays to control external devices and RS-232, 0-2 VDC, and 4-20mA outputs.
This is a special order item and ships for FREE to the contiguous United States.
If shipping to any other location, including Alaska, Hawaii and Canada, we will contact you to collect shipping charges prior to shipment of your product.