Portable pH Meter ST 423
The ST423 is a compact battery operated instrument designed to give the same reliability and accuracy in the field as you demand on the laboratory bench.
Simple traditional rotary controls ensure that the ST423 can be used by untrained operators to give temperature compensated results in seconds.
The ST423 pH Meter is a general purpose portable pH/mV/ Temperature meter. One or two point calibration is possible and the BNC connector allows the meter to be used with any of the impressive range of combination or half-cell pH electrodes from Dintok directION.
Manual and Automatic Temperature Compensation (ATC) are standard features. The clear LCD display allows the measurement of pH , mV and temperature. For ISE work the ST423 can be used in the mV mode. However it is recommended that accurate ion analysis be carried out using the ST451 (mV mode +/- 0.1mV) or the ST867P direct concentration Ion meter.
The ST423/Kit is ideal for field work with a robust Carry case, electrode, ATC probe, battery and calibration solutions.
Specification :
| Accuracy | +/- 0.01pH |
| Accuracy mV | +/- 1mV |
| Auto Temp | 0-100 Degrees C |
| Connection | BNC |
| Display | 12.7mm LCD |
| Manual Temp | 0-100 Degrees C |
| pH Calibration | 1 or 2 Points |
| Power requirement | 1 x PP3 Battery (9V) |
| Range mV | 0 +/-2000mV |
| Range pH | 0-14 |
| Ref. Electrode Connection | 4mm Ø Socket |
| Resolution mV | 1mV |
| Resolution pH | 0.01 |
| Size | 145x80x38.5mm |
| Temp Probe Connection | 3.5mm Ø jack |
| Temp Resolution | 0.1 Degree C |
| Weight | 265 g |
Accurate, On-the-Go pH Measurement with the Portable pH Meter ST 423
Ensure reliable acidity or alkalinity testing in the field, lab, or production line with the Portable pH Meter ST 423—a rugged, high-precision handheld instrument designed for environmental monitoring, food & beverage processing, aquaculture, wastewater treatment, and industrial quality control. Featuring automatic calibration, temperature compensation, and a durable IP67-rated housing, the ST 423 delivers lab-quality pH results anywhere—fast, safely, and with minimal maintenance.
Engineered for Field-Ready Accuracy and Durability
The ST 423 Portable pH Meter measures pH from 0.00 to 14.00 pH with ±0.01 pH accuracy and 0.01 pH resolution, supported by a fast-response, gel-filled combination electrode (replaceable). Its Automatic Temperature Compensation (ATC) ensures accurate readings across varying sample temperatures (0–100°C / 32–212°F), while the IP67 waterproof housing protects against dust, splashes, and temporary submersion—ideal for harsh or wet environments.
- High Accuracy: ±0.01 pH – Suitable for compliance testing and sensitive applications.
- IP67 Waterproof & Dustproof – Survives drops, rain, and washdowns; floats if dropped in water.
- Automatic Calibration (1–3 Points) – Recognizes pH 4.01, 7.00, and 10.01 buffers for quick setup.
- Backlit LCD with Stability Indicator – Clear display in low light; shows when reading is stable.
- Long Battery Life (500+ Hours) – Auto-off function conserves power; uses standard AAA batteries.
- Replaceable Electrode with Quick-Connect – Easy to maintain and upgrade; compatible with standard BNC or proprietary connectors.
Trusted Across Environmental and Industrial Applications
From checking effluent discharge and soil slurries to verifying food safety, brewing pH, or aquarium water quality, the ST 423 provides dependable data that supports regulatory compliance (EPA, HACCP, ISO) and process control. Its compact size fits in a pocket or tool belt, and its intuitive interface requires minimal training—making it ideal for technicians, inspectors, and researchers alike.
Whether you’re in a river, a brewery, or a bioreactor room, the Portable pH Meter ST 423 puts professional-grade pH analysis in the palm of your hand.
Measure with confidence—wherever your work takes you.
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