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SLDW1120 Series pH/ORP Meter

Professional Multi-Parameter Water Quality Monitoring Instrument for Industrial & Environmental Applications

Product Overview

The SLDW1120 Series pH/ORP Meter is a high-performance water quality monitoring device designed for accurate and stable measurement of pH, ORP (Oxidation-Reduction Potential), and temperature in various aqueous environments. Adopting advanced electrode sensing technology and built-in microcomputer circuits, it delivers reliable data for process control, environmental compliance, and quality assurance across industries. With features like long-term calibration stability, dual power supply compatibility, and robust protection ratings, it is engineered to adapt to harsh on-site conditions while minimizing operational hassle.

Working Principle

The core measurement principle for pH relies on the battery voltage generated between the electrode membrane and the solution: H⁺ ions in the solution react with the electrode membrane, producing a voltage proportional to the pH value. The controller's built-in microcomputer circuit accurately measures this voltage to calculate the pH value. For ORP and temperature, dedicated sensors work synergistically to capture real-time data, ensuring comprehensive water quality monitoring. The instrument integrates automatic temperature compensation and high-precision signal processing, guaranteeing measurement accuracy even in fluctuating environmental conditions.

Core Advantages

Tri-Parameter Synchronous Measurement

Simultaneously detects pH, ORP, and temperature in one device, eliminating the need for multiple separate monitors and simplifying on-site installation and management.

Long-Term Stability with Minimal Calibration

Factory-calibrated with a 1-year maintenance-free calibration cycle, reducing operational workload and ensuring consistent performance without frequent adjustments.

High Precision & Reliability

Boasts pH accuracy of ±0.1pH, ORP accuracy of ±1mV, and temperature resolution of ±0.1°C, delivering trustworthy data for critical process control and compliance monitoring.

Robust & Durable Design

Transmitter: IP65 protection rating (dustproof and water-jet resistant) with ABS+PC material, suitable for indoor/outdoor industrial environments.

Sensor: IP68 protection rating (fully submersible for long-term use) with plastic+glass construction, ensuring durability in various aqueous conditions.

Flexible Power Supply & Connectivity

Supports both 85-265VAC (50/60Hz) and 24VDC±10% power inputs, adapting to industrial grids, solar systems, and remote power sources. Equipped with multiple output options for seamless integration into control systems.

Data Security & User-Friendly Operation

Features automatic data storage and power-off data protection to prevent data loss. The LCD display clearly shows measurements, time, and instrument status, while on-site settings are easily configurable via transmitter buttons.

Versatile Output Functions

Offers 2 isolated 4~20mA analog outputs (programmable for pH/ORP/temperature) and 3 configurable relays (for high/low alarms or timing functions like self-cleaning), meeting diverse control and alarm needs.

Technical Specifications

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