Hanna HI9811-51 | Portable pH/EC/TDS/Temperature Meter (Agriculture & Hydroponics)

Streamline your nutrient management with the Hanna HI9811-51, a rugged "all-in-one" portable meter designed specifically for agriculture, greenhouses, and hydroponics in Pakistan. Instead of juggling three separate meters to check your fertilizer solution, this single unit measures pH, Conductivity (EC), Total Dissolved Solids (TDS), and Temperature using one specialized probe.

The HI9811-51 is favored by growers for its reliability in "noisy" environments. In a greenhouse, equipment like water pumps and lighting ballasts create electrical interference that can make standard pH meters jumpy or inaccurate. The HI9811-51 solves this with the HI1285-51 Amplified Probe, which boosts the signal and shields it from interference, ensuring stable readings every time.

Designed for simplicity, the meter features Manual Calibration Trimmers (knobs) on the front panel. This "old-school" analog calibration is preferred by many professionals because it is intuitive, fast, and allows for easy troubleshooting without navigating complex digital menus.

Key Features of the Product

• 3-in-1 Multiparameter System: Measures pH, EC, TDS, and Temperature with a single probe, allowing you to check the strength and acidity of your fertilizer mix instantly.
• Amplified Probe Technology: The included HI1285-51 probe features a built-in amplifier that prevents electrical noise from pumps and lights from interfering with your pH reading—a common issue in hydroponic setups.
• Manual Calibration: Features dedicated knobs for pH and EC/TDS calibration. This allows for quick verification and adjustment using a screwdriver, giving the user total control over the accuracy.
• Agriculture-Optimized Ranges: 
  • EC: 0 to 6000 µS/cm (ideal for most nutrient blends).
  • TDS: 0 to 3000 ppm (0.5 factor).
• Automatic Temperature Compensation (ATC): The probe includes a built-in temperature sensor that automatically corrects EC and TDS readings for temperature variations, which is critical for accurate nutrient dosing.
• Battery Efficiency: Runs on a standard 9V battery with approximately 150 hours of continuous use, ensuring it lasts through the entire growing season.

Frequently Asked Questions (FAQs)

Q: What is the main difference between HI9811-51 and HI9811-5?

A: They are very similar, but the HI9811-51 is the updated version often supplied with the HI1285-51 probe, which is specifically optimized for agricultural applications. Both share the same rugged manual calibration design.

Q: Can I use this for drinking water (RO) testing?

A: Yes. The TDS range (0-3000 ppm) covers drinking water perfectly. However, it is primarily designed for nutrient solutions (fertilizers). If you only need to test pure water, a dedicated low-range meter might be cheaper, but this unit will work fine.

Q: Why does it use manual calibration knobs instead of buttons?

A: Manual calibration is often preferred in industrial and agricultural settings because it is faster to "tweak" the reading to match a standard, and there are no software menus to get lost in. It is robust and simple.

Q: Does the probe need to be refilled?

A: No. The HI1285-51 probe is Gel-Filled, meaning it is maintenance-free and does not require electrolyte refilling. You just need to keep the tip clean and stored moist.

Q: How do I clean the probe after testing fertilizer?

A: Fertilizer salts can coat the sensor. We recommend rinsing the probe with tap water after every use and using Hanna HI700661 (Agriculture Cleaning Solution) once a week to remove mineral deposits.

Buy with Confidence

Optimize your crop yield with precise nutrient control. Order the authentic Hanna HI9811-51 Multiparameter Meter today from a leading reseller KAMADI in Pakistan to ensure you receive genuine equipment, fresh calibration solutions, and reliable support.