Benchtop pH Meter ST-550

● Occupy less place, Simple Operation
●Easy-to-read LCD Display with high luminant backlight
●Up to 3 points auto-buffer-recognition: Zero offset, Slope of Acid/Alkali segment, Ensure accurate
measuring results for the full range with Calibrated pointed displayed
●One key to check through all the settings, including: Zero offset, Slope of Acid/Alkali segment, and all
the settings
●150 data sets memory stores and recalls
●Auto Power off saves battery after 10-mins non-use
●Detachable Electrode Stand organizes multiple electrodes neatly, easy installing at either left or right
side and holds them firmly in place.

Specification :

pH	Range	-2.00 ~ 16.00 pH
	Resolution	0.01 pH
	Accuracy	±0.01+1LSD
mV	Range	-2000~2000 mV
	Resolution	1 mV
	Accuracy	±2 mV
Temperature	Range	-10.0°C~110.0°C
	Resolution	0.1°C
	Accuracy	0.5°C
pH Buffer Kinds	NIST	4.00, 6.86, 9.18
	USA	4.01, 7.00, 10.01
Others	Environment	-5°C~60°C, Relative humidity<90%
	Memory	150 sets
Dimensions	14021035mm (WLH)
Weight	630g

SKU: ST-550 Category: pH Meter Tag: pH Meter

High-Performance pH Analysis for Demanding Laboratories: Benchtop pH Meter ST-550

Achieve exceptional accuracy, stability, and data integrity with the Benchtop pH Meter ST-550—a professional-grade instrument engineered for pharmaceutical, biotechnology, food & beverage, environmental, and research laboratories where precision and compliance are non-negotiable. Featuring ±0.001 pH resolution, GLP-compliant data logging, and advanced electrode diagnostics, the ST-550 delivers laboratory-certified performance for critical pH, mV, and temperature measurements.

Engineered for Precision, Compliance, and Workflow Integration

The ST-550 Benchtop pH Meter supports 1–5 point automatic calibration with recognition of 16+ standard and custom buffers (pH 1.68 to 13.00) and includes Automatic Temperature Compensation (ATC) via a high-stability Pt1000 sensor (0–100°C ±0.1°C). Its large color LCD simultaneously displays pH, mV, temperature, calibration status, slope, offset, and stability indicator—ensuring full visibility and control during measurement.

Ultra-High Accuracy: ±0.002 pH | Resolution: 0.001 pH – Ideal for buffer standardization, titrations, and regulatory testing.
GLP/GMP-Compliant Data Management – Stores 2,000+ records with user ID, sample ID, date/time, and calibration data.
Multiple Connectivity Options – USB, RS232, and optional Bluetooth for seamless integration with LIMS, printers, or PCs.
Advanced Electrode Diagnostics – Real-time monitoring of slope (%), asymmetry (mV), and response time to ensure sensor health.
Stable Benchtop Design with Adjustable Electrode Holder – Ergonomic arm for precise probe positioning in beakers or vials.
AC-Powered with Low-Drift Electronics – Ensures long-term stability for extended measurements and calibration workflows.

Trusted in Regulated and High-Stakes Environments

From validating sterile injectables and monitoring cell culture media to ensuring compliance in dairy processing or wastewater discharge, the ST-550 meets the stringent requirements of FDA 21 CFR Part 11, ISO/IEC 17025, USP <791>, and EP 2.2.3. Its audit-ready data output, user access levels (on advanced models), and calibration lock features support full traceability and quality assurance.

Whether you’re running daily QC, developing new formulations, or preparing reference standards, the Benchtop pH Meter ST-550 delivers the accuracy, reliability, and documentation your science demands.

Precision engineered. Compliance ready. Laboratory proven.