specification :

Model	ION-300
Ion concentration
Measurement range	0.001~30000 (depending on the range of ion-selective electrode)
Display resolution	0.001, 0.01, 0.1, 1, automatic
Measurement accuracy	±0.5% F.S. (monovalent ion), ±1% F.S. (divalent ion)
Calibration point	2 to 5 o'clock
Calibration fluid	0.001/0.01/0.1/1/10/100/1000/10000
Units of measurement	ppm, mg/L, mol/L, mmol/L
Measurement method	Direct reading, known addition, known reduction, sample addition, sample reduction
Water hardness
Measurement range (conc.)	0.05~200 mmol/L
Measuring range (German °dH)	0~1120°dH
Measurement range (UK °e)	0~1404°e
Measurement range (French °fH)	0~2000°fH
Measurement Range (Ca²⁺)	0~8000 mg/L
Measurement range (CaCO₃)	0~19999 mg/L
Measurement Range (CaO)	0~11220 mg/L
Display resolution	0.001, 0.01, 0.1, 1, automatic
Measurement accuracy	±1% F.S.
Calibration point	2 to 5 o'clock
Calibration fluid	0.01/0.1/1/10/100 mmol/L
mV
Measurement range	±2000.0 mV
Display resolution	0.1 mV
Measurement accuracy	±0.2 mV
Measurement Range
SE-NH3 Ammonia Electrode Range:	0.01 to 17000 ppm
ISE-NH4 Ammonium Electrode Range:	0.1​ to 18000 ppm
ISE-Br Bromide Electrode Range:	0.4 to 81000 ppm
ISE-Cd Cadmium Electrode Range:	0.1 to 11200 ppm
ISE-Ca Calcium Electrode Range:	0.02 to 40100 ppm
ISE-Cl Chloride Electrode Range:	1 to 35000 ppm
ISE-Cu Copper Electrode Range:	0.06 to 6400 ppm
ISE-CN Cyanide Electrode Range:	0.03 to 260 ppm
ISE-F Fluoride Electrode Range:	0.02 to 1900 ppm
ISE-I Iodide Electrode Range:	0.06 to 127000 ppm
ISE-Pb Lead Electrode Range:	0.2 to 20800 ppm
ISE-NO3 Nitrate Electrode Range:	0.4 to 62000 ppm
ISE-K Potassium Electrode Range:	0.04 to 39000 ppm
ISE-Ag Silver Electrode Range:	0.01 to 107900 ppm
ISE-Na Sodium Electrode Range:	0.002 to 69000 ppm
ISE-S Sulfide Electrode Range:	0.003 to 32000 ppm
ISE-WH Water Hardness Electrode Range:	0.05 to 200 mmol/L
Ion Standard Solutions	For ion concentration calibration
Ionic Strength Adjusters	For adjusting the pH and background ionic strength
USB Cable	For transferring data or connecting power adapter
Thermal Printer	For printing the measurement data
Temperature
Measurement range	0~105°C / 32~221°F
Display resolution	0.1°C / °F
Measurement accuracy	±0.5°C / ±0.9°F
Calibration point	1 point
Calibration range	Measurement ± 10°C / °F
Other parameters
Temperature compensation	0~100°C / 32~212°F, manual or automatic
Stability conditions	Standard or high precision
Measurement mode	Continuous or automatic end lock
Regular interval readings	10/30/60 seconds, 10/30 minutes or off
Calibration expiration reminder	1 to 31 days or closed
High/low limit alarm	Optional
Password protection	4 digits
Data storage	1000 groups
Communication output	USB
Connector	BNC, 3.5mm microphone plug
Display screen	7-inch TFT LCD display
Power Type	DC12V power adapter
Dimensions	240 (L) × 220 (W) × 80 (H) mm
Gauge weight	1.7 kg