Pocket ORP meter featuring HORIBA unique flat sensor technology (Platinum Electrode) that allows measurement from a drop of sample as little as 0.3 ml. 
 
Pocket meter that measures both ORP and Eh values (voltage reading vs. the Standard Hydrogen Electrode or SHE)
 
⚫ This ORP meter is ideal to measure instantly liquid and solid samples anywhere in the field or in a lab. The meter can also be immersed in liquid samples (i.e. water samples). 
⚫ Ideal for soil testing, irrigation water, hydroponic water, disinfecting and cleaning solutions as well as municipal drinking, ground and well water. 
⚫ Measurement range from -1000 mV to +1000 mV 
⚫ 1 calibration point (255 mV)
⚫ Resolution / Precision: ±1 mV
⚫ Replaceable sensor 
⚫ Calibrate this ORP meter regularly with ORP Calibration Solution at 255 mV (14 ml solution bottle included with the meter).
⚫ HORIBA LAQUAtwin meter ORP-11 is fully waterproof (IP-67) and can deliver instant results, which makes it a perfect meter for easy and quick field-testing. The wide measurement range allows to measure most samples directly without having to do a dilution or filtration.
 
What is ORP? Oxidation Reduction Potential (ORP) indicates the ability of a solution to oxidize or reduce chemical species. This ability is related to the amount of oxygen present in the water. In some applications, ORP is a measure of the disinfecting (oxidizing) power of oxidants in a solution, such as chlorine, chlorine dioxide, and ozone. 
Positive ORP values ​​indicate a generally oxidizing environment, while negative values​​indicate a reducing environment. The ORP value is expressed in millivolts (mV) using a combination of an inert noble metal electrode (gold or platinum) and a reference electrode.
 
This meter includes: plastic case • 255 mV calibration solution (14ml) •  2 x CR2032 batteries • dropper • instruction and quick manuals.