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GroLine pH/EC Monitor

Regular price £373.46 £414.95 | Save £41.49 (9% off)
Tax included. Shipping calculated at checkout.
In Stock
SKU: 4347
Spend £50.00 more for free delivery (shipping surcharges still apply)

GroLine pH/EC Monitor

GroLine pH/EC Monitor


Offering continuous 24-hour monitoring, the GroLine Monitor automatically records data every 15 minutes for the past 30 days, storing minimum, maximum, and average values to identify patterns and mitigate potential issues.

Simplify nutrient solution management with the GroLine Monitor featuring a combined pH/EC/Temperature probe. Designed for hydroponics, aquaponics, and greenhouses, it's quick to set up and easy to use.

Key Benefits:

  • High and low alarms with LED indicators warn of process deviations by flashing the display and message.
  • Clear viewing on the large LCD with plant-friendly green backlighting, displaying a clock tag that disappears upon reading stabilization.
  • Three sensors in a rugged probe body: pH electrode with renewable cloth junction, amperometric EC/TDS sensor, and internal temperature sensor for temperature-compensated readings.
  • Single Quick Cal solution for pH and EC calibration.
  • Wide pH range from 0.00 to 14.00 pH.
  • Selectable EC to TDS ppm conversion factor (0.5 or 0.7).
  • Automatic Temperature Compensation for temperature variations, displaying temperature in °C or °F along with pH, EC, or TDS readings.
  • Ambient light sensor for automatic LCD dimming.
  • IP65-rated enclosure for durability in harsh growing environments.
  • 30-day data logging with readings logged every 15 minutes and storage of min, max, and average values.
  • Data transfer via USB-C port for easy transfer to memory stick or PC.

Green Light Technology:

The innovative HI-981420 GroLine monitor emits a gentle green light from its screen, complementing red and blue lighting systems without disturbing the plants' natural growth cycles.

Professional Accuracy:

Advanced algorithms and enhanced pH and TDS/ppm accuracy ensure operational consistency and a deeper understanding of plant needs.

3-in-1 Pre-amplified Probe:

A single, durable polypropylene body houses the pH, EC/TDS, and temperature sensors, making setup and handling effortless.

Quick Cal:

A single calibration solution for pH and conductivity ensures fast calibration, leading to accurate measurements and improved plant health and yield.



Delivery Information

Most orders are shipped within 24 hours.

Orders are currently shipped with Parcelforce (Express 24 service for standard and heavy/bulky items) or DPD Local (Premium next-day), a signature will be required on delivery. We have been shipping orders for 15 years and our courier choices are subject to change as service levels fluctuate.

All orders are shipped on a next day courier service – you will be informed via email or SMS the evening your order leaves us so you know to expect it the next day. On the morning of delivery you will get another SMS or email informing you of the expected delivery time.

If you have any questions on delivery please get in touch.

As the website calculates some charges by weight it is possible that shipping is not calculated correctly. We reserve the right to get in touch in these circumstances we will request the additional amount or offer to refund the order.

UK Delivery

Standard delivery to the UK Mainland addresses (excluding Scottish Highlands & Islands, offshore and N.I.) is charged at a flat rate of just £5.95 per order or £7.95 (for the premium next-day service), standard delivery (with Parcelforce) is free* for orders over £50.

*Large and/or heavy items attact a surcharge from our courier - shipping surcharges are calculated per item and are applied regardless of order value.

Non-UK mainland destinations are charged by weight.

International Delivery

Coming soon…

Collect in Store (Bristol)

We now offer a 'collect in store' option, which allows you to pay for goods online and collect from our Bristol store at time that suits you (within our opening hours).

The process is simple:

  1. place your order and pay online, select 'Pick Up' at checkout;
  2. receive an email confirming that the order is ready for collection;
  3. bring/show your confirmation email and photo ID to collect your order.


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