High quality sensor probes manufactured in the U.S.A. for Agrowtek's SXH, GXH, PHX sensor transmitters, and MDX, MPX, & GDX dosing systems. Agrowtek Sensors & Probes Temperature Probe -20 to 60°C 3 ft Tinned Lead Connection Made in USA Stainless steel probe, 1/4" diameter x 3" with 3ft lead pH Probe 0-14 pH 3 ft BNC Connection Made in USA High quality pH sensor probe Conductivity (EC) Probe 0- 5000 uS 3 ft Tinned Lead Connection Made in USA High quality electrical conductivity sensor probe Oxidation Reduction Potential (ORP) Probe -1000 to +1000 mV 3 ft BNC Connection Made in USA High quality ORP (Redox) sensor probe Dissolved Oxygen (DO) Probe 0 - 20 mg/L 3 ft BNC Connection Made in USA High quality galvanic DO sensor probe Sensors Require Continuous Contact Agrowtek systems require the sensors to be continuously in contact with the water in order to properly manage the dosing pumps. Probe can be located in the reservoir tank, or may be installed inline with a continuously recirculating water flow. pH & ORP probes must remain wet to avoid damage. Do not allow probe tips to dry! ** Manifold shown sold separately. **