Ph truncheon With it's easy to read illuminated display, one-touch calibration system, super clear instructions and no buttons to push, measuring ph just got a whole lot simpler. The flashing lights you love so much; the easiest calibration system ever; reliability only ym products can provide; the longest lasting replaceable probe on the market; auto-on and off just like the nutra-wand ec truncheon; automatic temperature compensation; a scale of 2.1 ph through 10.8 ph and it's available worldwide. Dimensions:415mm x 23mm . Weight:180g. Suitable for hydroponics, aquatics, pool and spa, waste water treatment, horticultural and agriculture, wherever an accurate measurement of liquid ph is Required. 100/1cartons