2
PH220-en-US_v3.5 3/21
Introduction
Congratulations on your purchase of the Extech PH220 waterproof pH/mV meter. This
microprocessor-based device with tactile push-buttons is battery operated and ideal for field use.
The PH220 simultaneously displays pH and temperature. The rubber holster which protects the
meter has a magnetic backing for convenient mounting. The built-in memory (25 readings) allows
STORE, RECALL, and CLEAR functionality. Careful use of this meter will provide years of reliable
service.
Specifications
Range (Resolution)
Accuracy
Temperature
32 to 194
o
F (0.1°<100
o
; 1
o
>100
o
)
0 to 90
o
C (0.1°)
± 1.8
o
F
± 1.0
o
C
pH
0.00 to 14.00pH (0.01pH)
± 0.02pH
-1999mV to 1999mV
± 2mV
Note 1: Accuracy does not include pH buffer temperature
coefficient
Note 2: Accuracy specified from 0.02pH to 13.98pH
Temperature Compensation
32 to 194
o
F (0 to 90
o
C) Automatic ‘ATC’
Power
9 volt alkaline battery
Display
Dual LCD display for simultaneous pH and temperature
readings
Over-range or open indication
Displays "HHH" for over-range or open input conditions
Displays “LLL” for under-range
pH Calibration points
4.00, 7.00, 10.00 (1, 2, or 3 point calibration can be
performed)
Auto Power OFF
10 minutes from last key-press (can be disabled)
Low Battery Indication
Fill bars in the battery display icon
represent
battery power status. The fewer the bars, the weaker the
battery power.
Dimensions / Weight
4.25 x 3.00 x 1.18" (108 x 75 x 30mm) / 4.8 oz. (135g)
Accessories supplied with kit
Battery, suction cup holder, clip holder, stick electrode for
model PH220-S, standard electrode with 39” cable for
model PH220-C.