On Sale 32% OFF RRP $149.95 Hot
Bluelab Digital EC Pen - Portable | Reliable | Temperature | PPM TDS EC

Bluelab Digital EC/TDS/PPM Pen

Now $102.56

On Sale 36% OFF RRP $174.95 Hot
BlueLab Truncheon Nutrient Meter - EC CF PPM | Waterproof | Blue Lab
On Sale 25% OFF RRP $84.95
HM COM-80 EC TDS PPM Conductivity Digital Meter - Pen | Digital Calibration
On Sale 24% OFF RRP $249.95 Hot
Bluelab Connect USB Stick - Data Log & View Nutrient Measurements Wirelessly

Bluelab Connect Stick USB

Now $189.95

On Sale 27% OFF RRP $349.90 Hot
BlueLab Digital pH & Temperature Pen + Digital EC PPM Pen + Probe Care Kit
On Sale 25% OFF RRP $5,499.95
Bluelab Dosetronic Peridoser Kit - PH EC Temp Controller | Auto Feed System
On Sale 30% OFF RRP $529.95 Hot
Bluelab Guardian Monitor - Measures EC PPM TDS CF PH Temp | AC Powered

Bluelab Guardian Monitor

Now $370.45

On Sale 20% OFF RRP $699.95 Hot
Bluelab Guardian Monitor Connect - EC PPM TDS CF PH Temperature | Data Stream

Bluelab Gardian Monitor Connect

Now $560.45

On Sale 22% OFF RRP $119.95 Hot
HM COM-100 EC TDS PPM Temp Digital Meter Pen - Conductivity | Digital Calibration
On Sale 24% OFF RRP $199.95
Horiba LAQUAtwin Compact EC Meter - EC11 | 2 Point Calibration | Delivery Only
On Sale 21% OFF RRP $239.95
Horiba LAQUAtwin Compact EC Meter - EC22 | 3 Point Calibration | Delivery Only
On Sale 19% OFF RRP $279.95
Horiba LAQUAtwin Compact EC Meter - EC33 | 3 Point Calibration | Delivery Only
On Sale 24% OFF RRP $149.95
Ionix Instruments EC Tester - 1 Year Warranty | IP67 Waterproof
On Sale 24% OFF RRP $149.95
Ionix Instruments TDS Tester - 1 Year Warranty | IP67 Waterproof
On Sale 24% OFF RRP $149.95 Hot
Milwaukee - EC60 | EC / TDS / Temp Waterproof Tester | Automatic Calibration
On Sale 24% OFF RRP $499.95 Hot
Milwaukee PH Meter + EC Meter MW710 - Carry Case Included | MW100 + MW302
On Sale 27% OFF RRP $174.95 Hot
Oakton Eutech Eco EC Tester - TDS PPM Conductivity | Digital Pen
On Sale 38% OFF RRP $99.95 Out Of Stock!
Nutrient Meter Wand - | EC PPM CF Conductivity Tester | Nutra-wand

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Established in 1987, HM Digital, Inc. (formerly known as Heemang Electronics) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter. Our products are co-designed between our Los Angeles office and our ISO-9001-certified factory in Seoul, Korea, producing high quality water testing and monitoring equipment for all types of water treatment and purification systems, including reverse osmosis (RO), that are sold in over 50 countries through ...


When you can test something easily and accurately, you can manage it. Specifically, you can get the most from water-based plant growing systems. And that’s Bluelab’s world. Our product range of pH meters and pH controllers and nutrient meters and controllers, measure parameters such as pH, conductivity and temperature. They’re used worldwide in applications from home-based hydroponics through to the most demanding of commercial food-growing environments. We’re a young company, so we’re innovators by nature. Crucially, we’re people focuss ...


OAKTON offers scientific instruments for research, industrial, and educational uses. These instruments are famous for their unique combination of innovative design and exceptional value, and represent "best buys" in their categories. ...


Author: Canna  

Now, let’s get down to it by understanding and accepting a couple of key points and rules of thumb. 1. Start To begin, herbaceous root systems require near 100% humidity , ideally, at all times, otherwise the root tips die back. The root tip is the very small end of the root that is divided into three zones. The length is variable and depends on many considerations such as plant variety, temperature, past water levels and much more. The root tip is responsible for absorbing t ...


Author: Dutch Master  

Hard water results primarily from excess calcium, magnesium, sodium and other minerals dissolved in the ground water. Too much of any of these can greatly alter the mineral nutrient balance in the root zone and nutrient reservoirs. Sodium, for instance, competes with Potassium and you may end up with Potassium deficiency symptoms like brown leaf tips and less than optimal growth & yields. Many other deficiency symptoms can occur when too much of one mineral is "out competing" others. Most hydroponic nutrients are formulated based on "pure water" and this ...


The HORIBA Group of worldwide companies provides an extensive array of instruments and systems for applications ranging from automotive R&D, process and environmental monitoring, in-vitro medical diagnostics, semiconductor manufacturing and metrology, to a broad range of scientific R&D and QC measurements. Proven quality and trustworthy performance have established widespread confidence in the HORIBA Brand. ...