Quick verdict
A dual-scale meter with an 11.6 inch probe that reads soil pH and, on a button, moisture, with the dial on top so you read it standing up. The long probe reaches the root zone of beds and large pots where short meters only test the surface. Like all probe pH meters it is a guide rather than a lab result, and it needs clean, moist soil and a clean probe to read sensibly.
Strengths
- 11.6 inch heavy duty probe reaches deep root zones
- Reads pH and moisture from one tool
- Dial on top for reading without bending
- No batteries
- Suits beds, large pots, compost and lawns
Weaknesses
- Probe pH meters are approximate; confirm with a test kit before amending soil
- Needs moist soil and a polished probe to read at all
- Generic brand with unknown consistency
The overall YardToolLab Score is out of 100. Section scores are out of 10.
Research Where the Roots Are
Most soil meters have a probe of a few inches and tell you about the surface. Roots of shrubs, deep raised beds and large containers live far below that. JINOARC’s heavy duty meter carries an 11.6 inch probe that reaches the root zone, reads pH continuously and moisture at the press of a button, and puts the dial on top so you read it without bending. It needs no batteries.
This review is based on the listing specifications and on how long-probe soil meters perform generally. We have not used this meter ourselves and the brand is a generic importer.
How Probe Meters Work
Two dissimilar metals in the probe generate a small voltage in moist soil that varies with acidity, and the dial reads it as pH. Moisture is read as conductivity when you hold the button. The method is quick and cheap and it is approximate: a probe meter puts you in the right neighbourhood, within about a pH unit, and tells you whether soil is wet or dry at depth. It does not replace a chemical test kit or a lab test for decisions about lime or sulphur.
The Long Probe
At 11.6 inches the probe reaches the active root zone of a raised bed, the bottom of a large container or the moist layer under a dry surface in a border. That depth is where the moisture reading becomes genuinely useful, since the top inch dries daily while roots sit in damp soil below. The heavy duty shaft resists bending in firm ground.
Using It Properly
Probe meters only read in moist soil and with a clean probe. Water the spot if it is dry, polish the probe with a cloth or fine pad, insert fully, wait a minute for pH, then hold the button for moisture. Take several readings around a bed rather than trusting one.
Build
A top-mounted dial is a real convenience in a bed you would otherwise kneel in. The housing is plastic and the probe metal, as on all meters of this type. Store it dry and clean.
Who Should Buy It
- Owners of deep raised beds and big containers who want root-zone moisture.
- Gardeners planting acid-loving shrubs who want a quick pH screen before buying a test kit.
- Anyone tired of short meters that only read the dry surface.
Common Owner Complaints
No reading in dry soil, pH that disagrees with a test kit and probes that corrode. All are the known behaviour of probe meters, managed by watering, verifying and polishing.
Alternatives to Consider
The Luster Leaf Rapitest kit gives chemical pH and nutrient tests for decisions. Digital pH meters with calibration solutions are more accurate for frequent testers. Reotemp’s moisture meters read moisture only but with a calibratable scale.
Verdict
As a quick way to read moisture and approximate pH deep in a bed, the long probe and top dial make this meter more useful than the short meters it competes with. Treat its pH as a screen, confirm before amending, and it earns a place in the shed.
Full specifications
JINOARC Heavy Duty Soil pH and Moisture Meter with 295 mm Probe FAQs
Rough. Probe meters read the electrical potential between metals in moist soil and give a ballpark figure within about a unit. For decisions about lime or sulphur, confirm with a chemical test kit or a lab test.
Probe meters need moisture to conduct. Water the spot, wait a few minutes, then insert.
Oxide on the metal blocks the reading. Wipe the probe with a cloth or fine abrasive pad before each use.
Roots of shrubs, deep beds and large containers live well below the surface inch. An 11.6 inch probe reads where the roots are.
