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Model	pH/ORP-5500	pH/ORP-5510	pH/ORP-5520
Power supply	DC 24V ±4V	AC 110V ±10%	AC 220V±10%
Measurement range	pH	0.00 ～ 14.00
	ORP	-1000mV～1000mV
	Temp.	0.0 ～ 99.9℃（Temp.Compensation component:NTC10K）
Model	pH	0.01
	ORP	1 mV
	Temp.	0.1℃
Accuracy	pH	0.1level
	ORP	≤±5mV(electronic component)
	Temp.	≤±0.5℃
Approximate input impedance	3×10¹¹ Ω
Buffer solution	pH value 10.00；9.18；7.00；6.86；4.00；4.01
Temp. compensation range	0 ～ 50℃（with 25℃ as standard）Manual and automatic temperature compensation
(4～20)mA	Channels	Single Channels
	Characteristics	Isolated, fully adjustable, reversible, instrument/transmitter for selection
	Loop resistance	500Ω(max)，DC24V
	Accuracy	±0.1mA
Control contacts	Electrical contacts	Double relay SPST-NO, hysteresis setting
	Load capacity	AC220V/AC110V 3A(max)；DC24V 3A(max)
Power consumption	<3W
Working environment	Temperature	0～50℃
	Relative Humidity	≤85%RH（none condensation）
Storage environment	Temp.:（-20～60）℃；relative humidity：≤85%RH（none condensation）
Dimension	96 mm×96mm×105mm (H×W×D)
Hole size	91（H）mm×91(W)mm
Installation	Panel mounted,fast installation