Hanna Meters & Monitoring Equipment

Hanna Meters & Monitoring Equipment are field-ready instruments designed for the demanding measurement requirements of commercial agriculture, including nutrient management, irrigation water analysis, and soil health monitoring. These tools prioritize durability, intuitive operation, and reliable data capture across critical parameters like pH, electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), and temperature.

Portable Combo and Multi-Parameter Testers
This category of handheld meters combines multiple measurement capabilities into a single, ruggedized instrument. The waterproof and portable pH/EC/TDS/Temperature meters are central to this offering. A key feature present in many models is the CAL Check system, which performs a diagnostic check on the electrode when placed in a specialized solution, alerting the user if the probe requires cleaning, calibration, or replacement before measurement errors occur. This is a critical function to ensure data integrity, as a damaged pH electrode can appear to calibrate normally but deliver incorrect sample readings. These meters typically utilize a multiparameter probe that integrates pH, EC/TDS, and temperature sensors into one body with a single connection, simplifying field use. To combat electrical interference common in agricultural environments from pumps and ballasts, many probes feature a pre-amplified pH electrode. Specifications for these instruments include a pH range of 0.0 to 14.0, with a common accuracy of ±0.1 pH, and an EC range suitable for agricultural solutions, such as 0.00 to 4.00 mS/cm or higher. For user protection, accessories such as shockproof rubber boots are available to guard against physical damage from drops or impacts in harsh environments.

GroLine Series for Agriculture and Hydroponics
The GroLine series is engineered for the specific and continuous monitoring needs of controlled-environment agriculture, hydroponics, and greenhouse operations. This range extends beyond portable meters to include dedicated monitoring solutions. Wall-mounted nutrient monitors provide continuous, real-time tracking of pH, EC, TDS, and temperature in a reservoir or flow line, delivering constant oversight of nutrient solution health. These systems are supported by inline probes designed for permanent installation in plumbing, as well as specialized direct soil EC testers for analyzing substrate conductivity. For user convenience, GroLine kits often bundle a primary tester, such as a waterproof pH/EC/TDS meter, with essential calibration and maintenance solutions in a single package, ensuring operators have everything required for immediate and accurate use.

Specialized Meters and Monitoring Equipment
Beyond core nutrient parameters, monitoring other water quality factors is essential. Dissolved oxygen (DO) meters, including portable models and versions with extended 10-meter cables for deep tank or pond profiling, measure the concentration of oxygen critical for root and aquatic health. These meters may use a galvanic DO sensor, which is a type of maintenance-free, membrane-based sensor. For monitoring oxidation-reduction potential (ORP), a key indicator of water sanitization and chemical activity, waterproof ORP/Temperature testers are available. A dedicated multi-parameter dissolved oxygen meter represents a higher-tier instrument for comprehensive water quality profiling.

Sensors, Probes, and Replacement Parts
Maintaining measurement accuracy requires proper care and timely replacement of consumable sensor components. A variety of probes are available to service different meter models. These range from general-purpose multi-parameter probes that measure pH, EC, and TDS simultaneously to specialized GroLine replacement electrodes for specific monitor models. Connector types vary, with some probes utilizing a standard BNC connector and others employing a DIN connector with an integrated cable, such as a 2-meter (6.6-foot) pH/conductivity probe with a temperature sensor. Critical spare parts include replacement galvanic DO sensors, which are consumable items that require periodic replacement to maintain DO measurement accuracy.