Starter Pen Meter Ohaus ST20M-B Multi, pH/Cond

Starter Pen Meter Ohaus ST20M-B Multi, pH/Cond

The Starter Pen Meter Ohaus ST20M-B Multi, pH/Cond is a versatile, portable instrument designed to measure pH, conductivity, TDS, and temperature with precision and ease. Because it combines four essential measurements in a single waterproof unit, this compact meter is ideal for laboratory, educational, industrial, and environmental applications that demand efficiency and reliability.

Features

• Four-in-One Measurement Capability: Measures pH, conductivity, TDS, and temperature — all in one device, saving time and simplifying testing.

• Wide Measurement Range: Covers 0.00–14.00 pH, 0–1999 µS/cm conductivity, and 0.0–1000 mg/L TDS with temperature monitoring from 0–99°C.

• High Accuracy and Resolution: Provides ±0.05 pH and ±2.0% full-scale conductivity accuracy, with fine resolutions of 0.01 pH and 1 µS/cm.

• Automatic Temperature Compensation (ATC): Ensures precise readings by automatically correcting for temperature variations.

• Three-Point Calibration: Enables high accuracy and stability for pH readings across multiple calibration points.

• Clear LCD Display: Shows pH, conductivity, and temperature readings simultaneously, allowing easy interpretation of results.

• Automatic Power-Off: Turns off automatically after six minutes of inactivity to save battery life.

• Long Battery Operation: Offers up to 100 hours of use with four AG13 disposable batteries (included).

• Waterproof and Durable: IP67-rated housing provides excellent protection against water and dust, ideal for field or lab environments.

• Lightweight and Ergonomic: Compact (110 g) design with an included wrist strap for easy handling and portability.

Specifications

• Meter Type: pH / Conductivity / TDS / Temperature

• Measurement Range (pH): 0.00 – 14.00 pH

• Measurement Range (Conductivity): 0 – 1999 µS/cm

• Measurement Range (TDS): 0.0 – 1000 mg/L

• Measurement Range (Temperature): 0.0 – 99.0°C

• Accuracy (pH): ±0.05 pH

• Accuracy (Conductivity): ±2.0% FS

• Accuracy (Temperature): ±0.5°C

• Resolution: 0.01 pH / 1 µS/cm

• Display: LCD

• ATC: Yes, automatic

• Calibration: 3-point calibration

• Temperature Sensor: 50 kΩ NTC

• Automatic Shutdown: After 6 minutes of non-use

• Battery Life: 100 hours (4 × AG13 batteries included)

• Protection Rating: IP67 (waterproof and dustproof)

• Dimensions (L × H × W): 185 mm × 45 mm × 38 mm

• Net Weight: 110 g

• Working Environment: 10°C – 40°C, 85% RH (non-condensing)

• Wrist Strap: Included

Applications

The Ohaus ST20M-B Multi Pen Meter is ideal for laboratories, aquaculture, schools, and industrial facilities that require multi-parameter water testing. Additionally, it is widely used in environmental analysis, wastewater treatment, and food and beverage quality control. As a result, users benefit from fast, accurate, and convenient pH, conductivity, TDS, and temperature measurements in one reliable device.