Specifications

ORP57/pH58
Pocket-size pH/ORP/Temperature Meters
with replaceable electrode
Replaceable combination
pH/ORP electrode for pH58
Replace the electrode in a fast and
simple way yourself! Just
unscrew the plastic ring on
the top of the electrode and
replace the electrode
with a new one.
Calibrations, Maintenance & Cleaning
Solutions
Choose from our wide selection of calibration, mainte-
nance and cleaning solutions at page 53.
Ordering Information
ORP57 is supplied complete with protective cap, carton
box, batteries and instructions.
pH58 is supplied complete with protective cap, 20 mL pH
4.01 and pH 7.01 sachets of calibration solution, carton
box, batteries and instructions.
Specifications
ORP57 pH58
Range pH -2.00 to 16.00 pH
ORP ±1000 mV ±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 0.01 pH
ORP 1 mV 1 mV
Temp 0.1°C / 0.1°F 0.1°C / 0.1°F
Accuracy pH ±0.05 pH
(@25°C) ORP ±2 mV ±2 mV
Temp ±0.5°C / ±1°F ±0.5°C / ±1°F
Typical EMC pH ±0.02 pH
Deviation ORP ±2 mV ±2 mV
Temp ±0.3°C / ±0.6°F ±0.3°C / ±0.6°F
pH Calibration automatic for pH, 1 or 2 points, from -5 to
60°C with 2 sets of memorized buffers
(pH 4.01, 7.01, 10.01 or 4.01, 6.86, 9.18)
ORP Calibration factory calibrated factory calibrated
Probe Mi57P (replaceable) Mi58P (replaceable)
Environment 0 to 50°C; max RH 100% -5 to 50°C; max. RH 100%
Battery Type 4 x 1.5V; IEC LR44, A76 4 x 1.5V; IEC LR44, A76
Battery Life approx. 300 hours of use approx. 250 hours of use
Auto-off after 8 minutes of non-use after 8 minutes of non-use
Dimensions 200 x dia 38 mm 200 x dia 38 mm
Weight 100 g 100 g
Accessories
Mi57P Replaceable electrode for ORP57
Mi58P Replaceable electrode for pH58
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)
MA9004 pH 4.01 buffer solution, 230 mL bottle
MA9006 pH 6.86 buffer solution, 230 mL bottle
MA9007 pH 7.01 buffer solution, 230 mL bottle
MA9009 pH 9.18 buffer solution, 230 mL bottle
MA9010 pH 10.01 buffer solution, 230 mL bottle
MA9015 Electrode storage solution, 230 mL
MA9016 Electrode cleaning solution, 230 mL
MA9020 ORP test solution (200/275 mV),
230 mL bottle
M10000B Electrode rinse solution, 20 mL
sachet (25 pcs)
Combination waterproof testers with advanced functions
also include the new model pH58 for simultaneous pH and
ORP measurements and temperature, which is continuous-
ly displayed on the dual level LCD.
It shows readings in an extended range from -2.00 to 16.00
pH or ±1000 mV and simultaneously shows temperature
from -5.0 to 105.0°C or 23 to 221°F.
The pH58 has a stability indicator and hold feature that
freezes the display for easy and accurate recording.
The large display also has graphic symbols to guide you
through all operations.
Calibration is performed automatically at 1 or 2 points using
standard or NIST buffers.
The modular design allows easy electrode and battery
replacement.
pH/ORP
15
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