PH400 Portable pH Meter

The Apera Instruments PH400 is a rugged, easy-to-use pH meter designed for accurate pH and temperature measurement in both lab and field conditions. With its IP57-rated water and dust resistance, it’s ideal for harsh environments. The included 201T-S pH electrode features a low-resistance glass membrane for quick and reliable readings, and an integrated temperature sensor enables automatic temperature compensation (ATC). The PH400 is also compatible with the 301Pt-S ORP electrode (sold separately) for redox potential measurements.

Whether you're working in environmental monitoring, water treatment, agriculture, or industrial applications, the PH400 delivers dependable performance in a compact, portable format.

Key Features

• Fast and accurate pH measurement with ±0.01 pH accuracy
• Measurement range: 0 to 14 pH, 0 to 100°C
• Includes 201T-S pH electrode with integrated temperature sensor
• Supports automatic temperature compensation (ATC)
• IP57-rated waterproof and dustproof for tough environments
• 1- to 3-point quick calibration ensures reliable accuracy
• Large, illuminated LCD shows pH, temperature, and calibration status simultaneously
• Self-diagnosis function supports calibration and troubleshooting
• Compatible with 301Pt-S electrode for ORP (redox) measurement (sold separately)
• CE certified for safety and quality
• 2-year warranty on the device (6 months on electrode)