Specifications

Sharp waterproof Testers are designed for all applications.
Their IP67 waterproof casings and double junction
replaceable electrodes make them suitable also for heavy
duty applications, such as wastewater treatment and agri-
culture.
The modular design allows easy electrode and battery
replacement.
Manual calibration on the pH51 prolongs the battery life
up to 1500 hours.
pH51 and pH52 have a 0.1 pH resolution while pH53 has
0.01 pH resolution.
ORP50 reads ORP with a resolution of 1 mV.
Choose your pH, ORP, Temp tester according to the proper
pH, ORP, Temp ranges for your application:
• pH51: 0.0 to 14.0 pH;
• pH52: -2.0 to 16.0 pH, -5.0 to 60.0°C;
• pH53: -2.00 to 16.00 pH, -5.0 to 60.0°C;
• ORP50: ±1000 mV.
pH51/pH52/pH53/ORP50
Microprocessor Waterproof pH/ORP/Temp Meters
pH/ORP
16
www.milwaukeeinst.com
Specifications
pH51 pH52 pH53 ORP50
Range pH/ORP 0.0 to 14.0 pH -2.0 to 16.0 pH -2.00 to 16.00 pH ±1000 mV
Temp -5.0 to 60.0°C / 23.0 to 140.0°F -5.0 to 60.0°C / 23.0 to 140.0°F
Resolution pH/ORP 0.1 pH 0.1 pH 0.01 pH 1 mV
Temp 0.1°C / 0.1°F 0.1°C / 0.1°F
Accuracy pH/ORP ±0.1 pH ±0.1 pH ±0.02 pH ±2 mV
(@25°C) Temp ±1°C / ±2°F ±1°C / ±2°F
Typical EMC pH ±0.1 pH ±0.1 pH ±0.03 pH ±2 mV
Deviation Temp ±0.2°C / ±0.4°F ±0.2°C / ±0.4°F
Temperature Compensation automatic automatic
Calibration manual, at 2 points automatic, 1 or 2 points automatic, 1 or 2 points factory calibrated
through trimmers
Adj.offset trimmer ±120 mV
pH Electrode MA73600 (replaceable) MA73047 (replaceable) MA73047 (replaceable)
ORP Electrode MA73500 (replaceable)
Environment 0 to 50°C, max RH 100% -5 to 60°C; max RH 100% -5 to 60°C; max RH 100% 0 to 50°C; max RH 100%
Battery Type 3 x 1.5V, alkaline 3 x 1.5V; alkaline (included) 3 x 1.5V; alkaline (included) 3 x 1.5V, alkaline (included)
Battery Life More than 1500 hours approx. 200 hours approx. 200 hours approx. 1000 hours
of continuous use of continuous use
Dimensions 165 x 30 x 30 mm 165 x 30 x 30 mm 165 x 30 x 30 mm 165 x 30 x 30 mm
Weight 80 g 80 g 80 g 85 g
Ordering Information
All waterproof testers are supplied in a carton box com-
plete with calibration solution, batteries, instruction manu-
al and screwdriver (only pH51) for calibration.
ORP50 is supplied in a carton box complete with batteries
and instruction manual.
Accessories
MA73047 Replaceable pH electrode with
built-in temperature sensor
MA73500 Replaceable ORP electrode
MA73600 Replaceable pH electrode
M10004B pH 4.01 buffer solution 20 mL
sachet (25 pcs)
M10007B pH 7.01 buffer solution 20 mL
sachet (25 pcs)
M10010B pH 10.01 buffer solution 20 mL
sachet (25 pcs)
MA9015 Electrode storage solution, 230 mL
MA9016 Electrode cleaning solution, 230 mL
MA9020 200/275 mV ORP solution, 230 mL
bottle
M10000B Electrode rinse solution, 20 mL
sachet (25 pcs)