Hanna HI520 Dual-Channel Universal Process Controller

Description

The Hanna HI520 Dual-Channel Universal Process Controller is engineered for industries requiring simultaneous and precise monitoring of up to two process variables from a selection that includes pH, ORP, Conductivity, and Dissolved Oxygen. Built with advanced technology and designed for maximum versatility, the HI520 caters to users needing real-time measurement, automation, and long-term stability for water, wastewater, food, beverage, aquaculture, and environmental applications. Its compatibility with Hanna Smart digital probes and its RS-485 Modbus communication capability make it ideal for integration into sophisticated process control networks. The rugged IP65 (NEMA 4X) waterproof enclosure ensures reliable operation in harsh indoor or outdoor environments, while its wall, pipe, and panel mounting options allow easy installation tailored to facility needs. These core design strengths give operators confidence in continuous monitoring, contributing to improved process efficiency and reduced operational downtime.

Robust Control Modes with On-Demand Flexibility

The HI520 offers advanced control capabilities with selectable set-point operations, including on/off, proportional, and PID (proportional-integral-derivative) modes. This flexibility enables precise tuning for optimal performance, ensuring that set points are maintained tightly to prevent overshoot and chemical waste. The controller supports independent or sequential channel control to handle separate processes in parallel or linked operations. Through flexible relay function assignment, relays can be configured for direct process control, auto-cleaning sequences, or even as hold relays to pause operations during maintenance. Each control relay is electromechanical and robust, with models offering up to five relays plus a dedicated alarm relay. Analog outputs, available in configurations of two or four galvanically isolated channels, enable fine modulation of pumps, valves, or dosing equipment, providing proportional control outputs for demanding industrial applications.

Comprehensive Alarm and Safety Management Functions

The HI520 features a configurable alarm system designed to provide immediate visual and audible alerts for various fault conditions. Operators can program alarms based on parameter set points, temperature limits, or abnormal operation detection. In the event of an alarm state, a prominent red Alarm LED blinks to ensure visibility even from a distance, while the relay state changes to safeguard the process — automatically inactivating all control relays until the issue is resolved. The unit includes a dedicated electromechanical alarm relay with SPDT contact output, fuse-protected for safety. Two digital inputs allow remote triggering of functions such as disabling control, initiating cleaning cycles, or placing the controller into hold status. This integrated safety and alarm architecture greatly reduces the risk of process upsets and equipment damage, especially in unmanned or remote facility operations.

Automated Probe Cleaning for Reliable Measurement Integrity

One of the standout features of the HI520 is its auto-cleaning capability, which maintains probe performance over extended periods. The user can program one or more wash cycles and use relays to control valves, pumps, or compressed air for cleaning routines tailored to the specific fouling characteristics of the process fluid. This automation extends probe life, reduces maintenance labor, and ensures more consistent measurement accuracy. For example, in wastewater treatment plants where biological deposits can quickly degrade electrode performance, the auto-wash system keeps sensor readings within specifications with minimal manual intervention. Similarly, in food and beverage production where residues and coatings can form, the cleaning function helps sustain operational precision without frequent process interruptions. By ensuring sensor cleanliness, the controller contributes directly to lower total cost of ownership and improved measurement reliability over time.

Advanced Data Logging and Diagnostic Capabilities

The HI520’s large backlit LCD clearly displays active measurements alongside indicators for potential issues. A dedicated DIAG (diagnostic) key gives detailed fault and status information, enabling quick troubleshooting without requiring external diagnostic tools. Data logging is extensive, allowing up to 100 lots, each capable of holding 8,600 records, with selectable logging intervals. Stored data includes both measurements and control settings, enabling detailed historical analysis of process performance and operational trends. For convenience, logs can be exported via a USB Type‑C connection directly to a flash drive in CSV format, allowing easy integration into laboratory information systems or quality control archives. This capability benefits industries where traceability and regulatory compliance are critical, such as pharmaceuticals, food processing, and drinking water production.

Wide Range of Industrial and Environmental Applications

The Hanna HI520 is utilized in numerous sectors where accurate monitoring and process control are mission-critical. In municipal water treatment, it regulates pH, ORP, and disinfection processes to meet safety regulations. In aquaculture, it maintains optimal oxygen and pH levels for aquatic life health. Beverage processors use it to control pH for flavor stability and compliance, while in chemical manufacturing, it ensures precise conductivity and oxidation-reduction potential control for product quality and consistency. Environmental monitoring stations rely on it for simultaneous dissolved oxygen and conductivity measurement in rivers and lakes, helping assess pollution and ecosystem health. Its dual-channel capability reduces the need for multiple dedicated controllers, saving space, cost, and integration complexity while improving process reliability. Coupled with its Modbus RS‑485 communications, it is a natural choice for centralized SCADA systems and remote operational monitoring.

Guaranteed Authenticity from Leading Online Supplier tpt24.com

For organizations and industrial professionals seeking the HI520 Dual-Channel Process Controller, tpt24.com stands as the world’s most trusted online supplier. Every unit sold through tpt24.com is guaranteed for authenticity and quality, supported by a manufacturer-backed warranty, and is shipped securely to customers in virtually any country. The store’s global logistics and competitive fulfillment times make it the preferred choice for buyers seeking not only the HI520 but also compatible Hanna probes and accessories. Their expertise in handling precision instrumentation ensures that purchasing through tpt24.com means receiving equipment in perfect factory condition, with confidence supported by worldwide delivery and dedicated after-sales support. Industrial clients across water treatment, environmental monitoring, and production facilities repeatedly turn to tpt24.com for its unmatched reliability and commitment to product integrity.

Durable Construction and Technical Specifications Overview

Physically, the HI520 has a compact footprint of 144 mm × 144 mm × 151.3 mm (width × height × depth), simplifying installation into standard instrument panels or mount enclosures. It is protected by a rugged IP65 enclosure suitable for wash‑down or outdoor conditions. The unit’s analog outputs support configurable ranges of 0–20 mA or 0–22 mA, ensuring compatibility with most actuators and control equipment. The high-voltage components are safeguarded by slow-blow fuses rated at 5A, 250V, ensuring operational and safety protection for relays and alarm circuitry. Electrical connectivity includes galvanically isolated outputs to minimize interference in sensitive industrial environments. Digital RS‑485 communication allows daisy chaining of up to 32 devices for integrated plant management. In short, the HI520 combines robust physical construction, electric safety design, and high-end control features, positioning it as a long-term investment for mission-critical process operations.