Advanced Portable pH Meter ST 451
The ST451 pH Meter is a flexible, portable pH meter offering a choice of manual or automatic control, 0.1mV resolution for ISE work and a recorder output.
The instrument is compact and battery operated designed to give the same reliability and accuracy in the field as you demand in the laboratory. The ST451 incorporate automatic buffer recognition and automatic temperature compensation (ATC) which ensures consistent error free calibration achieved with minimum fuss.
The clear LCD display shows pH, Temperature and mV to 0.1 mV resolution. This ensures that the ST451 is ideal for routine ISE and Redox measurements.
The BNC connector provides the ST451 to be connected to any Smart Co combination pH electrode, ISE electrode. This allows analysis of samples as diverse as water, cheese and oil to be analyzed using this meter.
Specification :
| Accuracy | +/- 0.01pH |
| Accuracy mV | +/- 0.2% or 1 Digit |
| Auto Temp | 0-100 Degrees C |
| Automatic pH calibration | 4, 7,10 pH |
| Commodity Code | 90278011 |
| Connection | BNC |
| Manual Temp | 0-100 Degrees C |
| Memory | Yes Back up |
| pH Calibration | 1 or 2 points |
| Range mV | 0-200mV /0-2000mV |
| Range pH | 0-14pH |
| Recorder Output | ±200.0mV |
| Ref. Electrode Connection | 4mm Ø Socket |
| Resolution mV | 0.1/1mV |
| Resolution pH | 0.01pH |
| Size | 145x80x38.5mm |
| Temp Probe Connection | 3.5mm Ø jack |
| Temp Resolution | 0.1 Degree C |
| Weight | 345g |
Professional-Grade pH Analysis in the Field: Advanced Portable pH Meter ST 451
Elevate your on-site testing capabilities with the Advanced Portable pH Meter ST 451—a high-performance, laboratory-precision handheld instrument engineered for demanding applications in environmental science, pharmaceuticals, food & beverage, biotechnology, and industrial process control. Combining ±0.002 pH accuracy, GLP-compliant data logging, and rugged IP67 protection, the ST 451 delivers unmatched reliability for professionals who require traceable, high-fidelity pH measurements outside the lab.
Engineered for Precision, Compliance, and Connectivity
The ST 451 Advanced Portable pH Meter features a high-resolution 0.001 pH display, automatic 1–5 point calibration with buffer recognition (pH 1.68 to 12.46), and real-time Automatic Temperature Compensation (ATC) via an integrated Pt1000 sensor. Its replaceable, double-junction pH electrode minimizes contamination and extends sensor life in complex matrices like wastewater, dairy, or protein-rich solutions.
- Ultra-High Accuracy: ±0.002 pH – Among the most precise portable meters available; ideal for R&D and regulated environments.
- GLP-Compliant Data Logging – Stores 1,000+ readings with time, date, calibration data, and user ID.
- IP67 Waterproof & Shock-Resistant – Fully sealed against dust and water; survives 1.5m drops.
- Bluetooth® & USB Connectivity – Wirelessly transfer data to smartphones, tablets, or PCs; compatible with lab software.
- Customizable Calibration & Alerts – Set stability criteria, slope limits, and out-of-range alarms.
- Long-Life Rechargeable Battery – Up to 800 hours of operation; USB-C charging with battery status indicator.
Trusted in Regulated and Research Environments
From validating buffer preparation in GMP cleanrooms to monitoring river acidification or fermentation pH in real time, the ST 451 meets the stringent demands of ISO/IEC 17025, FDA 21 CFR Part 11, and HACCP workflows. Its audit-ready data output and electrode diagnostics ensure traceability and reduce measurement uncertainty.
Whether you’re a field hydrologist, QC manager, or bioprocess engineer, the Advanced Portable pH Meter ST 451 brings laboratory-grade confidence to every measurement—anywhere, anytime.
Precision. Compliance. Connectivity—redefined in the palm of your hand.
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