Hanna Instruments HI9813‑61 pH/EC/TDS/Temperature Meter with CAL Check

The HI9813‑61 portable meter provides clear, reliable pH, EC, TDS, and temperature readings on a large, easy‑to‑read LCD designed for fast field and greenhouse measurements. Each parameter displays with practical resolution and accuracy, including ±0.1 pH and ±2% full‑scale EC/TDS performance. The meter supports automatic temperature compensation for EC and TDS, ensuring stable readings even with fluctuating environmental conditions. Manual single‑point calibration for both pH and EC/TDS keeps operation simple, while on‑screen prompts guide users through calibration and measurement steps. Paired with the HI1285‑61 amplified probe, the system minimizes electrical noise interference and delivers dependable results in agricultural, hydroponic, and greenhouse applications. HI1285‑61 polypropylene body amplified pH electrode with built‑in EC/TDS and temperature sensors The HI9813‑61 includes the HI1285‑61 multi‑sensor probe, combining pH, EC, TDS, and temperature measurement into a single durable polypropylene body. The integrated design connects to the meter through an 8‑pin DIN connector, ensuring secure communication and stable readings during field use. Amplified pH electrode The built‑in amplifier protects the pH signal from electrical noise, a common challenge in environments with pumps, motors, and lighting systems. This ensures more consistent pH measurements in greenhouses and hydroponic setups. Amperometric EC/TDS sensor The EC/TDS portion of the probe uses an amperometric sensor, applying an alternating voltage across stainless steel pins. Conductivity increases as dissolved salts rise, allowing accurate nutrient and water quality monitoring. Polypropylene body The rugged polypropylene housing protects all sensors in a single maintenance‑free design. The gel‑filled pH electrode eliminates the need for refilling, making the probe ideal for frequent field use. 3 sensors integrated into one probe Pre‑amplified pH electrode reduces electrical interference Gel‑filled, maintenance‑free pH design Features at‑a‑glance Waterproof Automatic Temperature Compensation All readings automatically adjust for temperature variations EC to TDS conversion factor Conversion factor automatically adjusts from 0.56 to 0.78 based on EC Based on the 442 natural water curve Low Battery Indicator