ADWA AD1040 pH-ORP-Temperature Benchtop Meter (Built-in Memory)


Up to 3-point calibration with 7 memorized buffers and two custom buffers; Manual or automatic temperature compensation; pH calibration using buffers with 0.001 resolution; GLP feature to view last calibration data; Log-on-demand (50 samples)

  • Parameters: pH, ORP, Temperature


AD1040 is a professional benchtop meter for pH, ORP (Oxidation Reduction Potential), and temperature measurements. Relative mV readings are also provided.

pH Specifications

pH range

-2.00 to 16.00 pH / -2.000 to 16.000 pH

pH Resolution

0.01 pH / 0.001 pH

pH Accuracy (@25ºC/77ºF)

±0.01 pH / ±0.002 pH

pH Calibration

Up to 3 point calibration, with 2 custom and 7 standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)

Temperature Compensation

Automatic for pH readings

ORP Specifications

ORP range

±2000 mV

ORP Resolution

0.1 mV (±999.9 mV) / 1 mV (outside)

ORP Accuracy (@25ºC/77ºF)

±0.2 mV up to ±699.9 mV / ±0.5 mV up to ±999.9 mV / ± 2 mV outside

ORP Calibration

Factory calibrated

Temperature Specifications

Temperature Range

-20.0 to 120.0°C (- 4.0 to 248.0°F)

Temperature Resolution

0.1°C / 0.1°F

Temperature Accuracy

±0.4°C (±0.7°F) (excluding probe error)

Temperature Unit

°C and °F

Additional Specifications

pH Electrode/Probe

AD1131B - Refillable, glass body pH electrode with double junction, BNC connector and 1 m cable (Included)

Temperature Electrode/Probe

AD7662 - Stainless steel temperature probe with 1 m cable (Included)


View last calibration data for pH and relative mV


Log-on-demand: Up to 50 samples;

Hold function


Stability indicator


Low battery indication


Power supply

12 Vdc power adapter (included)


1.8 kg


230 x 180 x 50 mm

Ordering Information

AD1040 is supplied complete with AD1131B refillable pH electrode with glass body, BNC connector and 1 m cable, AD7662 stainless steel temperature probe with 1 m cable, pH 4.01 & pH 7.01 calibration buffers (20 ml sachet each), electrode holder, 12 Vdc power adapter, and user manual.


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