PH328 Soil pH Meter: pH/Temperature/Moisture Measuring for Garden, Lawn, Farm Plant Care
Introduction
The PH328 Soil pH Meter is a compact, portable handheld instrument engineered for rapid and reliable on-site soil testing. This multi-parameter device measures soil pH (acidity/alkalinity), temperature, and humidity simultaneously, enabling users to evaluate soil conditions directly in the field without the need for laboratory equipment or complex calibration processes.
Its intuitive design features a long stainless-steel probe for deep soil insertion, a clear backlit LCD with switchable °C/°F units, and simple one-button operation for power, mode selection, and backlight control. Powered by two 1.5V AAA batteries, the best pH meter for soil testing includes automatic shut-off after 5 minutes of inactivity to conserve energy, along with low-battery alerts for uninterrupted fieldwork.
Ideal for farmers, gardeners, researchers, and environmental professionals, the PH328 soil pH test meter delivers quick, actionable insights to optimize crop growth, adjust soil amendments, and monitor environmental health effectively.
Working principle
The PH328 digital soil pH meter employs electrochemical sensing technology via its integrated probe in 3 steps:
Step 1: pH Measurement
The soil test pH meter‘s probe tip uses a pH-sensitive electrode (glass or composite) that detects hydrogen ion (H⁺) concentration in soil moisture. When inserted into moist soil, the electrode generates a small voltage proportional to the pH level according to the Nernst equation. This voltage is converted into a digital pH reading on the LCD.
Step 2: Temperature Measurement
An integrated thermistor sensor measures soil temperature, which is crucial for compensating pH readings (as pH is temperature-dependent).
Step 3: Humidity Measurement
A capacitive humidity sensor detects relative humidity in the soil by measuring changes in capacitance caused by moisture levels.
The device switches modes via the MODE button, displaying one parameter at a time. Readings stabilize quickly (within seconds) after insertion, and the backlit display ensures visibility in low-light conditions.
Note: Measurements are most accurate in moist soil; dry or overly compacted soil may require watering or loosening for reliable results.
Key Features
The PH328 soil pH meter stands out for its practical combination of accuracy, durability, and ease of use. Here are its core features:
- Multi-Parameter Monitoring: Simultaneously measures soil pH, temperature, and humidity in one compact device.
- High-Resolution LCD Display: Clear backlit screen with °C/°F switching, battery indicator, and mode icons.
- Long Stainless Steel Probe: 210 mm length allows deep, representative soil sampling (recommended insertion depth: 150 mm).
- User-Friendly Operation: One-button power on/off, mode switching, and backlight control; auto shut-off after 5 minutes to conserve battery life.
- Portable & Durable: Lightweight (107–111 g) with protective probe cap; suitable for fieldwork.
- No Frequent Calibration Needed: Factory-calibrated for immediate use; no complex setup required.
- Low Power Consumption: Runs on 2 × 1.5V AAA batteries with low-battery alert.
- Versatile Display Modes: Quick toggle between pH, temperature, and humidity readings.
Specification
| Measuring range | 2.0 pH~8.5 pH |
| Accuracy | ±0.2pH |
| Resolution | 0.01 pH |
| Soil temperature | -10°C~60℃ |
| Measurement accuracy | ±1.5°C |
| Liquid temperature | 0°C~60°C |
| Soil moisture range | 1%RH~84%RH |
| Measurement accuracy | 4%RH |
| Resolution | 0.1%RH |
| Operating temperature | -10°℃~60°C |
| Auto power-off | Shutdown after 5 minutes without operation |
| Screen | LCD backlit display |
| °C/°F unit switching | √ |
| Mode selection | pH/temperature/humidity three measurement modes |
| Probe length | 210mm |
| Power supply | 2×1.5V (AAA) battery |
| Product net weight | 111g |
| Product size | 65x65x270mm |
Applications
The PH328 soil test pH meter is widely used in scenarios requiring fast, on-site soil health assessment:
- Agriculture & Crop Management: Monitor soil acidity/alkalinity to optimize fertilizer application, select suitable crops, and prevent nutrient lockout (e.g., for vegetables, fruits, grains).
- Horticulture & Gardening: Ideal for home gardens, greenhouses, lawns, and potted plants to adjust soil conditions for better growth.
- Soil Research & Education: Field studies, agronomy experiments, and teaching tools for soil science.
- Environmental Monitoring: Assess soil quality in contaminated sites, reclamation projects, or ecological surveys.
- Specialized Uses: Mushroom cultivation, composting, turf management, and orchard management, where soil pH directly impacts yield and health.
