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To replace the batteries unscrew the battery 

compartment cap and replace all four 1.5V batteries 

while paying attention to their polarity. Make sure 

the gasket is in place before screwing back the cap.

Batteries should only be replaced in a 

nonhazardous area using the battery type specified 

in this instruction manual.

ACCESSORIES

MI56P

Replaceable electrode for 

pH55

 & 

pH56

M10004B

pH 4.01 buffer, 20 ml sachet, 25 pcs.

M10007B

pH 7.01 buffer, 20 ml sachet, 25 pcs.

M10010B

pH 10.01 buffer, 20 ml sachet, 25 pcs.

MA9004

pH 4.01 buffer, 230 ml bottle 

MA9006

pH 6.86 buffer, 230 ml bottle

MA9007

pH 7.01 buffer, 230 ml bottle

MA9009

pH 9.18 buffer, 230 ml bottle

MA9010

pH 10.01 buffer, 230 ml bottle

MA9015

Electrode storage solution, 230 ml

MA9016

Electrode cleaning solution, 230 ml

M10000B

Electrode rinse solution, 20 ml sachet, 

25 pcs.

SPECIFICATIONS

RANGE

 

-2.0 to 16.0 pH (

pH55

); 

-2.00 to 16.00 pH (

pH56

);

 -5.0 to 60.0°C / 23.0 to 140.0°F

RESOLUTION

 

0.1 pH (

pH55

); 

0.01 pH (

pH56

); 

0.1°C / 0.1°F

ACCURACY (@25°C)

 

±0.1 pH (

pH55

); 

±0.05 pH (

pH56

); 

±0.5°C / ±1°F

TYPICAL EMC DEVIATION

 

±0.1 pH (

pH55

); 

±0.02 pH (

pH56

); 

±0.3°C / ±0.6°F

TEMPERATURE COMPENSATION

 Automatic, 

 

from -5 to 60°C

CALIBRATION

 

Automatic, 1 or 2 points 

with 2 sets of memorized buffers 

(pH 4.01, 7.01, 10.01 or 4.01, 6.86, 9.18)

PROBE

 Replaceable 

MI56P

ENVIRONMENT

 

-5 to 50°C; 100% RH max.

BATTERY TYPE

 

4 x 1.5V; IEC LR44, A76

BATTERY LIFE

 

approx. 300 hours of use

AUTO-OFF

 

after 8 minutes of non-use

DIMENSIONS

 

200 x dia 38 mm

WEIGHT

 

100 g

CERTIFICATION

Milwaukee Instruments conform to the CE 

European Directives.

 

Disposal of Electrical & Electronic Equipment.

 

Do not treat this product as household waste. Hand 

it over to the appropriate collection point for the 

recycling of electrical and electronic equipment.

Disposal of waste batteries.

 This product contains 

batteries. Do not dispose of them with other 

household waste. Hand them over to the appropriate 

collection point for recycling.

Please note: proper product and battery disposal 

prevents potential negative consequences 

for human health and the environment. For 

detailed information, contact your local 

household waste disposal service or go to 

www.milwaukeeinstruments.com

 (USA & CAN) 

or 

www.milwaukeeinst.com

.

RECOMMENDATION

Before using this product, make sure it is entirely 

suitable for your specific application and for the 

environment in which it is used. Any modification 

introduced by the user to the supplied equipment 

may compromise the meter’s performance. For your 

and the meter’s safety do not use or store the meter in 

hazardous environment. To avoid damage or burn, do 

not perform any measurement in microwave ovens.

WARRANTY

These instruments are warranted against defects in 

materials and manufacturing for a period of 2 years 

from the date of purchase. Probe is warranted for 

6 months This warranty is limited to repair or free 

of charge replacement if the instrument cannot 

be repaired. Damage due to accidents, misuse, 

tampering or lack of prescribed maintenance is not 

covered by warranty. If service is required, contact 

your local Milwaukee Instruments Technical Service. 

If the repair is not covered by the warranty, you will 

be notified of the charges incurred. When shipping 

any meter, make sure it is properly packaged for 

complete protection. 

Milwaukee Instruments reserves the right to 

make improvements in design, construction and 

appearance of its products without advance notice.

ISTPH56 07/20

USER MANUAL

SATISFACTION

GUARANTEED

milwaukeeinstruments.com (USA & CAN)

milwaukeeinst.com

pH55 & pH56

PRO Waterproof

pH/Temperature

Testers

pH56

ON/OFF

CAL

SET

HOLD

pH56

pH/T

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W

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