HM-WS4 Karl Fischer Coulometric Titrator

Product Introduction

The HM-WS4 is a high-performance Karl Fischer coulometric titrator designed for precise water content determination in professional laboratory environments. Equipped with a 10.0-inch 1024 × 600 pixel true-color TFT-LCD display, it provides comprehensive data visualization with simultaneous multi-unit results displayed in μg, mg/L, ppm, and %. The Cortex-A8 processor running the Android operating system delivers responsive instrument control and data management.

The instrument employs alternating balance isolation detection technology and PWM pulse-width modulated electrolysis circuit for stable and accurate low-level moisture determination. With a measurement range from 0.0001% (1 ppm) to 100% and a sensitivity threshold of 0.01 μg H₂O, the HM-WS4 is capable of trace-level water analysis in demanding applications. Multiple endpoint judgment methods are supported, and a variety of calculation formulas are available to accommodate different sample types and testing protocols.

Communication and connectivity are comprehensive: RS232, RS485 serial ports and USB interface enable PC communication and system integration, while mobile APP remote control allows operators to monitor and operate the instrument from a distance. Cloud data upload is supported for centralized information management. The embedded thermal printer outputs 36-character Chinese text for on-site documentation, and 20,000 experiment results can be stored internally. The bilingual interface supports free switching between Chinese and English.

Applications

• High-precision moisture determination in pharmaceutical APIs and excipients

• Trace water content analysis in petrochemical products and solvents

• Moisture measurement in chemical reagents and electronic-grade materials

• Water content testing for quality inspection and certification agencies

• Low-level moisture analysis in coatings, polymers, and specialty chemicals

Features

1. 10.0-inch 1024 × 600 pixel true-color TFT-LCD display with comprehensive data visualization

2. Cortex-A8 high-speed processor running Android operating system

3. Touchscreen with capacitive human-sensing keyboard for responsive input

4. Bilingual interface with free switching between Chinese and English

5. PWM pulse-width modulated electrolysis circuit for stable low-level moisture detection

6. Alternating balance isolation detection technology for measurement reliability

7. Simultaneous multi-unit display: μg, mg/L, ppm, and %

8. Mobile APP remote control for wireless instrument operation and monitoring

9. Full communication interfaces: RS232, RS485, and USB for PC connectivity

10. Automatic fill-and-drain capability (optional) for streamlined reagent management

11. Program-controlled stirring speed for reproducible analysis conditions

12. 20,000 experiment result storage with embedded thermal printer (36-character Chinese output)

13. Multiple endpoint judgment methods and calculation formula selection

14. Real-time clock display (year/month/day/hour/minute/second) with power-failure retention

15. Cloud data upload support for centralized information management

Main Parameters

Parameter	Specification
Detection Principle	Karl Fischer coulometric method
Measurement Range	0.0001% (1 ppm) to 100%
Sensitivity Threshold	0.01 μg H₂O
Display	10.0-inch TFT-LCD, 1024 × 600 pixel
Processor	Cortex-A8, 1 GHz
Storage Capacity	20,000 experiment results
Communication	RS232, RS485, USB, mobile APP
Printer	Embedded thermal, 36-character Chinese
Weight	Approx. 10 kg

Technical Parameters

Parameter	Specification
Model	HM-WS4
Display	10.0-inch LCD color touchscreen, 1024 × 600 pixel
Measurement Range	0.0001% (1 ppm)–100%
Sensitivity Threshold	0.01 μg H₂O
Accuracy (5 μg–1 mg)	±2 μg
Accuracy (>1 mg)	0.2%
Operating Temperature	15°C–28°C
Operating Humidity	<65%
Power Supply	AC 220V ±10%, 50 Hz ±5%
Power Consumption	<60 W
Dimensions	385 × 290 × 280 mm
Weight	Approx. 10 kg
Compliant Standards	25+ national and industry standards

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