4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA BNC connector, suitable for most pH and controller BNC connectors<br> Application: Suitable for a wide range of aquariums, hydroponics, laboratories and others<br> Response time:less than equal 1min<br> Operating temperature:0℃-60℃<br> Temperature (ºC):0℃-50℃<br> Connection form:Low-noise cable leads directly.<br> Zero potentiometer (PH):7±1<br> PH range:0-14<br> error (mV):less than equal 15<br> Internal resistanceMohm(25℃):less than equal 250<br> Theoretical percentage slope%: equal 97<br> Terminal Blocks:BNC plug<br> The repeatability (pH):less than equal 0.017<br> Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance.<br> Colour:As Shown<br> Material:Plastic<br> Package Contents:<br> 1 * Electrode Sensor<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.