Swansensor pH FL Sensor without reference electrode (use A-87.860.100), PG13.5, screw plug Specifications Only in combination with Swansensor Reference FL, A-87.860.100. Contact us to place an order. Downloads Downloads Click Here Related Products Flowcontroller Swansensor Shurecon for Chematest 35/42 Swansensor Fluoride Sensor cable for Sensors with M16 plug