Specifications QJ series ph meter is an easy-use basic pH meter designed for daily

testing and controls are required.

Introduction?of?pH?meter Standard hydrogen electrode is the reference point for all potential measurement. A standard hydrogen electrode is a platinum wire, an electrolytic plating method (coating) on a platinum chloride, and the hydrogen gas in the surrounding (fixed pressure 1013hpa) composition. ? Automatic?Calibration: Special attention should be tested solution temperature before calibration. In order to correctly select the standard buffer, and adjust the temperature compensation knob on the electric meter panel, making it consistent with the temperature of the test solution. At different temperatures, the pH standard buffer solution is not the same. ? Auto-Buffer?Recognition: The meters is capable of calibrating up to 2 points using USA or NIST pH standard buffer. Press the CAL key to enter calibration mode and immerse pH sensor into indicated calibration solutions, press ENTER key and meter is automatically calibrated. Specification?of?Ph Test Solution ?

Model	QJ-666A	QJ-666B	QJ-666C
???pH?Range	0.00~14.00pH	0.00~14.00pH	0.00~14.00pH
???pH?Accuracy	±0.05pH	±0.01pH	±0.01pH
???mV?Range	-1999~1999mV	-1999~1999mV	-1999~1999mV
???mV?Accuracy	±10mV	±1mV	±1mV
???Temperature?Range	---	---	0~100°C
???Temperature?Accuracy	---	---	±1°C
???Temperature?Compensation	0~100°C,?Manual	0~100°C,?Manual	0~100°C,?Automatic?or?Manual
???Calibration?Points	2?points
???Calibration?Solutions	USA?(pH4.01,?7.00,?10.01)?or?NIST?(pH4.01,?6.86,?9.18)
???Power?Requirements	DC9V,?using?AC?adapters,?220VAC/50Hz
???Dimensions	210(L)×205(W)×65(H)mm
???Weight	1.7kg

? pH?meter?is?an?easy-use?benchtop?meter?designed?for?daily?testing?and?controls. ? Features: Large backlit LCD display shows mode indicators and helpmessages. Up to 3 points push-button calibration with auto-buffer recognition. Selectable pH buffer standards and temperature units. Automatically calculates and shows electrode slope after calibration. Automatic Temperature Compensation ensures highly accurate measurement over the entire pH range. Automatic endpoint function freezes the stable measured values for easy reading and recording data. Manual temperature calibration provides accurate temperature value. ? ?

Model	QI-666D
pH?Range	-1.00~15.00pH
???pH?Accuracy	±0.01pH
???mV?Range	-1000~1000mV
???mV?Accuracy	±1mV
???Calibration?Points	1,?2?or?3?points
???Calibration?Solutions	USA?(pH4.01,?7.00,?10.01)?or?NIST?(pH4.01,?6.86,?9.18)
???Temperature?Range	0~105°C,?32~221°F
???Temperature?Accuracy??	±1°C
???Temperature?Calibration	Manual
???Temperature?Compensation	0~100°C,?32~212°F,?Automatic?or?Manual
???Auto-Off	Manual?or?Automatic?(180?minutes?after?last?key?pressed)
???Hold?Function	Manual?or?Automatic
???Reset?Function	Yes
???Connector	BNC
???LCD?Display	Custom?Dual-Display?LCD?(135×75mm)
???Power?Requirements	DC9V,?using?AC?adapters,?220VAC/50Hz
???Dimensions	210(L)×205(W)×75(H)mm
???Weight	1.2kg

? Please?feel?free?to?contact?if?you?need?any?further?information?about?Ph Test Solution