Soil pH Meter
A fast, battery-free digital probe for measuring soil acidity and alkalinity in seconds. Knowing your soil pH is the first step to choosing the right fertiliser, correcting nutrient deficiencies, and improving crop yield — without guesswork.
How to Use
Choose Your Test Spots
For an accurate picture of your field, take readings from at least 5 different spots — corners, centre, and any areas where plants look different. Avoid spots near paths, compost heaps, or where lime or fertiliser was recently applied.
Clean the Probe
Wipe the metal probe clean with a damp cloth before each test. Residue from previous tests or fertiliser can give a false reading. Never use soap or bleach on the probe.
Moisten the Soil
The probe requires moist (not waterlogged) soil to work. If the soil is dry, add a small amount of distilled water and wait 5 minutes before testing. Tap water can contain minerals that skew the reading — distilled or rainwater is better.
Insert the Probe
Push the probe straight down 10–15 cm into the soil with gentle, steady pressure. Do not twist or force it — this can bend or damage the sensor tip. The probe must be fully in contact with moist soil for the meter to work.
Read the Result
Wait 60 seconds for the needle to stabilise, then read the pH value on the dial. Take 2–3 readings in the same spot (removing and reinserting the probe each time) and average the results for accuracy.
Record and Act
Write down the pH reading for each spot. If readings vary by more than 1.0 unit across your field, consider zone-based management. Clean the probe after the final reading and store in the cap provided to protect the sensor tip.
Soil pH Reference Guide
Key Features
Battery-Free Operation
The probe generates its own signal from soil chemistry — no batteries to replace, ever. Always ready in the field.
Instant Results
Reading stabilises within 60 seconds. Test multiple spots across your field in under 10 minutes.
20 cm Probe Depth
Long probe reaches the active root zone, not just the surface — giving a reading that reflects what your crops actually experience.
Wide pH Range
Reads from pH 3.5 (very acidic) to pH 8.0 (alkaline), covering all common East African soil types.
Waterproof Probe
The stainless steel probe is sealed for moisture resistance — safe to use in wet season soils.
Compact & Portable
Fits in a shirt pocket. Lightweight enough to carry across the whole farm without slowing you down.
Correcting Soil pH — What to Do with Your Results
- pH below 5.5 (too acidic): Apply agricultural lime (calcium carbonate) at 1–3 tonnes per hectare. Incorporate into the top 15 cm of soil at least 2–3 months before planting for best results.
- pH above 7.5 (too alkaline): Apply elemental sulphur or use acidifying fertilisers such as ammonium sulphate. Results take several weeks — re-test monthly to monitor progress.
- pH 6.0–7.0: Ideal for most crops. Maintain with balanced organic matter (compost) and avoid over-liming.
- Test your soil at the start and end of each growing season to track trends — seasonal cropping and heavy fertiliser use can gradually shift pH over time.
- If two adjacent spots differ by more than 1.0 pH unit, dig deeper to check for buried debris, old termite mounds, or hardpan layers that create local variation.
- Always calibrate your meter in a neutral reference solution (pH 7.0) once per season if a calibration kit is available — this keeps results accurate over time.
