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Do you want to know whether the pH value of water you drink is up to the standard? If so, this pen-type pH meter is what you need. Featuring the automatic temperature compensation which will automatically compensate the solution temperature of 0~70℃, it can provide you the accurate and stable reading. Wholesale pH Sensor Electrode Probe

Digital Tachometer (RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a digital displays.Applying the MCU, photoelectricity and laser semiconductor technology, perform measurement of rotating speed Contact and Non Contact, Wholesale DIGITAL TACHOMETER AR925 AR926

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SMART SENSOR tachometer (RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a digital displays.Applying the MCU, photoelectricity and laser semiconductor technology, perform measurement of rotating speed without contact, Wholesale DIGITAL TACHOMETER AS926

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