Starter 400 Ohaus ST400M-F PH & Conductivity Portable

Starter 400 Ohaus ST400M-F PH & Conductivity Portable

The Starter 400 Ohaus ST400M-F PH & Conductivity Portable is a high-performance portable meter that combines pH, conductivity, resistivity, TDS, salinity, mV, and temperature measurement in one versatile instrument. Designed for professionals who require precise and reliable data both in the lab and in the field, it delivers accuracy, convenience, and durability for a wide range of water-quality and chemical applications.

Key Features

The ST400M-F offers an extensive measurement range, covering –2.00 to 16.00 pH, 00.0 μS/cm to 199.9 mS/cm conductivity, 0–20 MΩ·cm resistivity, and –5°C to 110°C temperature. Moreover, it ensures high accuracy with ±0.01 pH, ±0.5% F.S. conductivity, ±1 mV, and ±0.3°C, guaranteeing reliable results across multiple testing conditions.

This model includes two premium electrodes: the ST320 IP67 pH electrode and the STCON3 IP67 conductivity electrode, both featuring 3-meter cables for flexibility and waterproof performance in demanding environments. The automatic temperature compensation (ATC) ensures stable readings regardless of temperature fluctuations, while the LCD backlit display provides clear visibility in both bright and dim settings.

In addition, the rechargeable battery offers up to 40 hours of continuous operation, making it ideal for long field sessions. Because it is compact and lightweight at 0.77 lb (0.35 kg), the ST400M-F is comfortable to handle and easy to transport. Its rugged yet ergonomic design ensures durability without compromising ease of use.

Technical Specifications

• Model: Ohaus Starter ST400M-F Portable Meter

• Measurement Range (pH): –2.00 to 16.00

• Measurement Range (mV): –1999 to +1999

• Measurement Range (Temperature): –5°C to 110°C

• Measurement Range (Conductivity): 00.0 μS/cm – 199.9 mS/cm

• Measurement Range (Resistivity): 0 – 20 MΩ·cm

• Measurement Range (TDS): 0.1 mg/L – 199.9 g/L

• Measurement Range (Salinity): 0 – 99.9 psu

• Accuracy: ±0.5% F.S.; ±0.3°C; ±1 mV; ±0.01 pH

• Resolution: 0.01 pH; 0.01 psu; 0.1°C; 0.01 mg/L; 0.01 MΩ·cm; 1 mV

• Display: LCD Backlit Display

• Electrodes: ST320 IP67 pH Electrode (3 m) + STCON3 IP67 Conductivity Electrode (3 m)

• Temperature Compensation: Automatic (30 KΩ NTC Sensor)

• Battery Life: 40 hours (Rechargeable)

• Power Supply: Rechargeable Battery (Included)

• Net Weight: 0.77 lb (0.35 kg)

• Dimensions (L × H × W): 9.05 × 1.57 × 3.94 in (230 × 40 × 100 mm)

• Working Environment: 5°C – 40°C, 80% RH, non-condensing

• Measured Parameters: pH / Conductivity / Resistivity / TDS / Salinity / mV / Temperature

Applications

The Ohaus ST400M-F is ideal for environmental monitoring, wastewater treatment, aquaculture management, chemical research, and educational laboratories. Because it supports multiple measurement parameters, it streamlines workflows by replacing the need for separate instruments. Furthermore, the dual IP67 waterproof electrodes make it dependable for outdoor and on-site testing, while its automatic temperature compensation ensures consistent accuracy in variable conditions.