pH Pen Meters

Ohaus Pen pH meters provide accurate readings and a straightforward operation at an affordable price. A ph tester is useful in the field or lab for soil classification and other applications measuring pH or relative acidity or alkalinity of a sample at a given temperature. These meters have a pH measurement range from 0 to 14pH. The working environment for both units is 50°F to 104°F (10°C to 40°C) and 85%RH, non-condensing.

The pocket-size meters display readings on a large, easy-to-read digital LCD display. These digital pH meters endure prolonged environments and are constructed with durable ABS housing. They also feature an IP67 waterproof design to prevent water damage.

A protective cap to safeguard the sensor and a wrist strap is included. Meters have an automatic shutdown feature that preserves battery life. The waterproof ph meters operate for approximately 200 hours on four included AG13 button-cell batteries.

MA-257 has a range of 0–14pH, 0.1pH resolution, and accuracy of ±0.1pH. The built-in electrode is factory calibrated with no need for use of Buffer Solution. It features a single-line LCD display.

MA-258 has a range is 0–14pH, resolution is 0.01pH, and ±0.05pH accuracy. It also has temperature compensation with a range of 0–99.0°C (32.0 to 210.2°F). The built-in electrode features a 3-point calibration using 4.01, 7.00, and 10.01 Buffer Solution (sold separately). The dual-line LCD screen displays pH and temperature values.

Features:

• Easy-to-read display
• ABS housing
• Automatic shutdown feature preserves battery life
• IP67 waterproof design
• Battery-powered

Included Items:

• Economy or Standard pH Pen Meter
• Four AG13 button-cell batteries
• Wrist Strap

Accessories:

• Buffer Solutions are a calibration solution for calibrating ph pen meter (MA-258 model only)