Measure NPK in minutes, not days

The NPK Nutrient Meter Kit allows growers to measure Nitrate, Phosphate and Potassium (NPK) in minutes — with one probe and just 50ml of sample solution. This accurate, instant test is simple to operate and avoids the need to send samples to the test laboratory, along with all the cost and delay that causes so much frustration.

The meter is calibrated with one or two Multi-Cal Standard Solutions and displays all three parameter results in ppm on the screen. Results can be stored in the internal memory and downloaded to Excel for storage and manipulation.

Features include:

• Direct readout of NPK ppm in minutes
• Very low cost per test
• Easy to use
• One single probe with replaceable low-cost sensors
• Maintenance-free dry storage probe
• Rugged kit contains everything needed for the test
• Portable — can be used anywhere
• Can be used directly on diluted nutrient feed
• Made in the UK

The NPK Meter Kit can also be used for monitoring run-off from coir bags in polytunnels, river water and other environmental applications.

How the measurement works

Add 50ml of your sample using the measuring cylinder into the plastic beaker, insert the NPK Sonde and press READ. The Nitrate and Potassium results are displayed first, before adding 5ml of Reagent A and B. The Phosphate result is then shown alongside N and K. For soil analysis, NP&K are extracted from the sample and the direct reading can be used to calculate, for example, a Kg/Hectare fertiliser requirement.

Replaceable solid-state sensors

The NPK Sonde has 4 replaceable solid-state, low-cost sensors that can be changed individually. These are maintenance-free electrodes that store dry with an indefinite shelf life. Expected sensor lifetime is around 2–4 years depending on frequency of use and application. Each sensor is colour-coded for correct placement, and the sonde connects to the meter via a 1-metre cable and mini-DIN connector.

Data storage

NPK data is stored in the internal memory (10,000 data points) and downloaded into Excel via the Micro USB connector.

What's in the kit

NPK Meter, NPK Sonde, 100ml Beaker, 50ml Measuring Cylinder, Stirrer, Reagent A (100ml), Reagent B (100ml), 5ml Reagent A Syringe, 5ml Reagent B Syringe, RB400 Boot/Stand, E8402 Large Carry Case, MultiCal Standard 1 (500ml) and MultiCal Standard 2 (500ml).

MultiCal Standards (500ml) are required for weekly calibration (typically 50ml per calibration).