pH Sensor InPro4260i/SG/225 Back Catalog number: 52005382 Availability: In the manufacturer's stock Price on request - + Recommended MA811/2 Conductivity/TDS probe with 2meter cable (MC410). Price on request MA923D/1 pH/ORP/Temp amplified probe MA923D/1 Price on request MI56P pH/Temp probe for pH55 and pH56 Price on request