GroLine Monitor for Hydroponic Nutrients – HI981421 (Threaded Probe)
Brand Chemical Supplies is a premier supplier of the Hanna Instruments HI981421 GroLine Monitor, the professional choice for 24/7 climate and nutrient oversight in South African hydroponics, aquaponics, and greenhouse facilities. This specific “Threaded Probe” configuration is engineered for insertion mounting, allowing you to screw the sensor directly into irrigation piping for continuous, real-time flow-through monitoring.
Pricing & Availability
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Price: R17,500.00 (Excl. VAT)
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Status: Availability on Request (Typically 2–4 weeks lead time for specialized probes).
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Regional Logistics: Fast dispatch across Johannesburg, Pretoria, Cape Town, and Durban.
Technical Specifications
| Feature | Specification |
| Model | HI981421-02 (South African Region) |
| Probe Model | HI1285-9 (Threaded 3/4″ NPT) |
| pH Range | $0.00 \sim 14.00 pH$ |
| EC Range | $0.00 \sim 10.00 mS/cm$ |
| TDS Range | $0 \sim 5000 ppm$ (0.5 CF) / $0 \sim 7000 ppm$ (0.7 CF) |
| Temp Range | $0.0 \sim 60.0 °C$ ($32.0 \sim 140.0 °F$) |
| Enclosure | IP65 Rated (Dust and Splash Resistant) |
| Data Logging | Automatic every 15 mins (stores last 30 days) |
| Output | USB-C for easy data transfer to PC or stick |
Key Features & Benefits
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In-Line Threaded Mounting: The HI1285-9 probe features a 3/4″ NPT threaded connection, allowing for a secure, leak-proof installation directly into your nutrient delivery lines. This eliminates the need for separate bypass systems or manual sampling.
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3-in-1 Pre-Amplified Probe: Combines pH, EC/TDS, and Temperature sensors into a single, rugged polypropylene body. The pre-amplifier protects the sensitive pH signal from electrical interference generated by large irrigation pumps and grow lights.
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Quick Cal Technology: Calibrate both pH and Conductivity simultaneously using a single sachet of Hanna’s Quick Cal solution. This reduces maintenance time from 10 minutes to under 60 seconds.
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Visual Alarm System: High and low alarm limits can be set for all parameters. If your nutrients drift out of range, the entire display flashes to provide an immediate visual warning to the grower.
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Automated Data Integrity: The monitor automatically logs your results every 15 minutes, allowing you to review 30-day patterns, minimums, maximums, and averages via the USB-C port.
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Ambient Lighting Sensor: Includes an integrated light sensor that can automatically dim the display in dark environments to prevent disturbing the photoperiod of light-sensitive crops.
Primary Applications
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Commercial Hydroponics: Continuous nutrient monitoring for NFT (Nutrient Film Technique) and Drip systems.
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Greenhouse Fertigation: Real-time feedback for automated nutrient injection systems.
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Aquaponics: Balancing the sensitive pH and EC requirements for fish health and plant growth.
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Industrial Vertical Farming: Scaling nutrient oversight across multiple racks using a centralized monitoring hub.
What’s Included?
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HI981421 GroLine Monitor
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HI1285-9 Threaded 3-in-1 Probe (with cable)
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Quick Cal Buffer Solution Sachets
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Electrode Cleaning Solution Sachets (specifically for Agriculture)
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12V DC Power Adapter
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Calibration Certificates & User Manual
Contact our horticultural technical team today to secure your HI981421 GroLine Monitor and ensure your nutrient solution is perfectly balanced 24 hours a day
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