Apera PH20 Value Pocket pH Meter

Simple pH Testing with Automatic Calibration and ATC

The Apera PH20 Waterproof Pocket pH Meter is designed for straightforward routine pH testing in water, hydroponics, pools and spas, aquaculture, water treatment and other general aqueous samples. Its pocket-sized design combines automatic calibration, Automatic Temperature Compensation and stable-reading recognition with an IP67 waterproof housing.

The PH20 measures from 0 to 14.0 pH with 0.1 pH resolution and ±0.1 pH accuracy, making it a practical value-series tester for everyday measurements where simple operation and portability are priorities.

Automatic 1 to 3-Point Calibration

The PH20 supports automatic calibration at up to three points, reducing the amount of manual adjustment required before testing. Built-in self-diagnosis helps identify common calibration errors and incorrect buffer use.

Automatic Temperature Compensation

Automatic Temperature Compensation (ATC) operates from 0°C to 50°C, allowing the tester to compensate pH measurements according to sample temperature.

Stable Reading Recognition

The PH20 automatically identifies when a measurement has stabilised. A smiley-face indicator appears on the display, helping the user determine when the reading is ready to record rather than relying on guesswork.

IP67 Waterproof and Floatable Housing

The tester has an IP67 waterproof rating and is designed to float if accidentally dropped into water, making it particularly convenient for routine measurements around tanks, pools and other water-testing locations.

Designed for Everyday Water Testing

The built-in pH sensor is designed for regular water-solution testing, including pools and spas, hydroponics, tap water, drinking water, water treatment, aquaculture and cooling-water applications.

Up to 2,000 Hours of Battery Operation

Four AAA batteries provide up to 2,000 hours of continuous operation under the manufacturer’s specified conditions. The meter also provides a low-battery warning and automatically powers off after eight minutes without operation.

Complete Kit for Getting Started

The PH20 is supplied as a complete kit with calibration solutions, batteries, lanyard and a rugged carrying case, providing the essential items required to calibrate, transport and begin using the tester.

Key Features

• Pocket-sized digital pH tester
• 0 to 14.0 pH measurement range
• 0.1 pH resolution
• ±0.1 pH accuracy
• Automatic 1 to 3-point calibration
• Automatic Temperature Compensation from 0°C to 50°C
• Temperature measurement from 0°C to 50°C
• Automatic stable-reading recognition
• Smiley-face stability indicator
• Built-in self-diagnosis
• 180° viewing-angle LCD
• IP67 waterproof protection
• Floatable housing
• Low-battery warning
• Automatic power-off after 8 minutes
• Up to 2,000 hours battery operation

Technical Specifications

Model	Apera PH20
Product Type	Waterproof Pocket pH Tester
pH Range	0 to 14.0 pH
pH Resolution	0.1 pH
pH Accuracy	±0.1 pH
Calibration	Automatic, 1 to 3 points
Temperature Compensation	Automatic, 0°C to 50°C
Temperature Range	0°C to 50°C
Temperature Resolution	0.1°C
Temperature Accuracy	±0.5°C
Electrode	Built-in pH electrode with temperature sensor
Electrode Replaceable	No
Stable Reading Indication	Yes – smiley-face indicator
Self-Diagnosis	Yes
Waterproof Rating	IP67, floatable
Power Supply	4 × AAA batteries
Battery Life	Up to 2,000 hours continuous operation
Auto Power-Off	After 8 minutes without operation
Dimensions	40 × 31 × 178 mm
Weight	107 g

Typical Applications

• Hydroponics
• Pools and spas
• Aquaculture
• Tap and drinking water
• Water treatment
• Cooling water
• General water quality testing
• Routine aqueous sample testing

What’s Included?

• Apera PH20 Pocket pH Tester
• pH 4.00 Calibration Solution
• pH 7.00 Calibration Solution
• pH 10.01 Calibration Solution
• 4 × AAA Batteries
• Lanyard
• Carrying Case

Explore our complete range of pH testers and water quality meters for routine, field and laboratory measurements.