Full view of the LT7900HD reagent-free digital water hardness sensor, featuring a rugged 316L stainless steel housing for continuous industrial monitoring.
Angled view of the industrial wastewater hardness tester's threaded mounting head, built for continuous process measurement without requiring pre-treatment or reagents.
Close-up of the LT7900HD ion-selective hardness analyzer tip, displaying the exposed sensor components designed for direct concentration detection.
Close-up of the multi-parameter hardness probe, integrating NH4⁺-N, pH, and K+ compensation for high-precision boiler feedwater analysis.
Full view of the LT7900HD reagent-free digital water hardness sensor, featuring a rugged 316L stainless steel housing for continuous industrial monitoring.
Angled view of the industrial wastewater hardness tester's threaded mounting head, built for continuous process measurement without requiring pre-treatment or reagents.
Close-up of the LT7900HD ion-selective hardness analyzer tip, displaying the exposed sensor components designed for direct concentration detection.
Close-up of the multi-parameter hardness probe, integrating NH4⁺-N, pH, and K+ compensation for high-precision boiler feedwater analysis.

LT7900HD RS485 Digital Water Hardness Sensor Boiler Feedwater

LT7900HD RS485 digital water hardness sensor ensures continuous, reagent-free boiler feedwater monitoring with a rugged 316L stainless steel IP68 probe.

● Reagent-Free Ion Selective Electrode (ISE) Technology
Utilizes an advanced ISE method to measure water hardness directly without the need for sample pre-treatment or chemical reagents. This ensures zero secondary pollution and drastically reduces long-term maintenance and operating costs.
● Intelligent Multi-Parameter Compensation
Integrates selective, NH4⁺-N, pH, potassium (K+), and temperature electrodes into a single, compact sensor. These parameters continuously cross-correct and compensate each other in real-time, guaranteeing highly stable and precise hardness measurements even in complex media.
● Rugged 316L Stainless Steel & IP68 Design
Engineered with a heavy-duty 316L stainless steel housing and an IP68 waterproof rating. It is built to survive continuous submersion and resist corrosion in harsh environments, from industrial wastewater to high-pressure boiler feedwater systems.
● RS485 Modbus RTU Digital Communication
Features built-in digital RS485 output, allowing for seamless, plug-and-play integration into industrial PLCs, SCADA systems, and remote water quality early-warning networks without signal degradation.
● Wide Measurement Range (0-1000.0 mg/L)
Offers a highly versatile measurement span with exceptional accuracy (±5%FS). It is equally effective for monitoring trace hardness in purified boiler water as it is for measuring high hardness levels in municipal tap water, printing and dyeing processes, or electroplating wastewater.

Reagent-Free Digital Hardness Analyzer Features

The LT7900HD RS485 Digital Water Hardness Sensor Boiler Feedwater is an advanced, reagent-free ISE probe designed for precision water quality analysis. It features intelligent multi-parameter compensation (NH4⁺-N, pH, K+, temperature) to ensure unmatched accuracy. Built with a rugged 316L stainless steel IP68 housing, this water hardness sensor operates seamlessly across a 0-1000.0 mg/L range with a standard 5-meter cable and Modbus output. It effectively solves continuous monitoring challenges by eliminating secondary chemical pollution. Ideal for automation engineers and procurement managers, it guarantees optimal safety in boiler feedwater systems, electroplating wastewater treatment, and municipal drinking water facilities.

RS485 Online Hardness Electrode Technical Specs

Measuring range: 0-1000.0mg/L (NH4⁺-N)
Resolution: 0.001/0.01
Accuracy: ±5%FS (NH4⁺-N), ±0.3℃
Communication: RS485 Modbus RTU
Power: ≤ 3W
Protection level: IP68
Usage conditions: Temperature: 0-45 ℃, humidity ≤ 85%, ≤ 0.2MPa, pH: 4-10, no electromagnetic field interference;
Power Supply: DC 12~24V, current <50mA
Probe cable length: 5 meters (default), can be customized
Housing material: 316L Stainless steel
Calibration: Two-point calibration

Industrial Boiler Water Hardness Sensor Applications

● High-Purity Boiler Feedwater & HVAC Systems
Traditional hardness monitoring relies on colorimetric reagents that can contaminate pure water lines. The LT7900HD utilizes a reagent-free Ion Selective Electrode (ISE), safely providing continuous inline monitoring for economizers, condensers, and boiler feedwater to prevent catastrophic scaling without introducing secondary pollution.
● Complex Industrial Wastewater (Electroplating, Chemical, & Dyeing)
Industrial effluent is notorious for high ionic interference that skews standard sensors. Because the LT7900HD features integrated multi-parameter compensation (specifically filtering out NH4⁺-N, K+, and pH fluctuations), it delivers highly accurate hardness readings even in turbulent, chemically complex wastewater matrices.
● Ecological Water Quality & Early-Warning Networks
Remote river, lake, and reservoir monitoring stations require extremely low-maintenance hardware. With its IP68 submersible design and zero-reagent requirement, this sensor is uniquely equipped for long-term, unattended deployment in environmental early-warning systems and drinking water source protection.
● Food, Beverage, & Pharmaceutical Processing
Strict hygiene standards govern process water in these sectors. The sensor’s premium 316L stainless steel housing ensures sanitary, corrosion-resistant operation, making it ideal for verifying purified water and circulating water quality in strict compliance with industry regulations.
● Municipal Sewage & Large-Scale Treatment Plants
Handling sudden spikes in hardness from urban runoff is challenging. The sensor’s ultra-wide measurement range (0-1000.0 mg/L) combined with real-time RS485 digital output allows plant automation systems to instantly adjust softening processes during extreme load changes.

Extra Information

Online Water Hardness Analyzer Features

The LT7900HD represents a breakthrough in water quality monitoring by utilizing an advanced Ion Selective Electrode (ISE) method. Unlike traditional colorimetric systems, this reagent-free online water hardness analyzer operates without chemical consumables, completely eliminating secondary pollution and drastically reducing long-term maintenance costs. It intelligently integrates NH4⁺-N, pH, potassium (K+), and temperature electrodes into a single, compact sensor to achieve real-time multi-parameter compensation. This continuous cross-correction guarantees highly stable and precise measurements across a wide measurement range of 0-1000.0 mg/L, even when deployed in fluctuating or chemically complex liquid media.

Industrial Boiler Feedwater Sensor Applications

Engineered with a heavy-duty 316L stainless steel housing and an IP68 submersible waterproof rating, this sensor is built to survive in both ultra-pure and highly corrosive industrial environments. As an industrial boiler feedwater sensor, it prevents critical equipment scaling by providing continuous, highly accurate hardness data to facility control rooms. Beyond power generation, it is widely utilized for process control in electroplating wastewater, printing and dyeing, food processing, and pharmaceutical manufacturing. Equipped with an RS485 Modbus RTU digital communication interface, it seamlessly integrates into PLCs, SCADA systems, and large-scale municipal sewage treatment networks to deliver reliable water quality early-warning protection.

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