The Gravity: Analog Spear Tip pH Sensor / Meter Kit is a specialized solution designed to directly measure pH levels in semisolid materials such as wet soil and various food items. Equipped with a spear-like stainless steel protective shield, this sensor allows direct insertion into soft samples without damaging the electrode, which is not possible with standard pH probes.
This kit is ideal for agricultural applications like soil testing as well as food quality assessment, including pH measurement in fruits, vegetables, and meats. For instance, determining the pH of meat can be a reliable indicator of freshness.
The sensor is Arduino compatible, and with the included signal transmitter board, users can quickly set up a functional pH meter system for real-time testing. This tool is perfect for educational, experimental, and light-duty field applications.
Key Features
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Spear tip pH probe for semisolid materials (e.g., wet soil, meat, fruits)
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Stainless steel protective shell with sharp tip for direct insertion
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Arduino-compatible plug-and-play design
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Gravity interface and BNC connector for easy integration
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Accurate analog output with wide pH detection range
Applications
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Soil pH testing in agriculture and gardening
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Food freshness detection in research and education
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Quick pH checks in semi-solid samples like produce and compost
Technical Specifications
Spear Tip pH Probe
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Measuring Range: 0 ~ 10 pH
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Accuracy: ±0.1 pH
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Response Time: ≤2 minutes (in buffer solution)
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Operating Temperature: 5 ~ 60°C
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Salt Bridge Material: Poly Tetra Fluoro Ethylene (PTFE)
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Shell Material: Polyoxymethylene (POM)
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Wiring Connector: BNC
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Cable Length: 850mm (BNC included)
Signal Transmitter Board
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Input Voltage: +5.00V
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Output Signal: 0 ~ 4.0V
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Accuracy: < ±0.2 pH @ 25°C
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Probe Connector: BNC
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Module Connector: Gravity PH2.0-3Pin
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Dimensions: 43mm × 32mm (1.69 × 1.26 in)
Package Includes
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1x Spear Tip pH Probe
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1x Stainless Steel Spear Tip Shell
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1x Signal Transmitter Board
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1x Gravity 3-Pin Analog Cable
Important Notes
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Not suitable for hard solids, oily, high-viscosity, or particle-rich samples.
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Do not use for non-aqueous titration or prolonged immersion.
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Clean the probe thoroughly after each use.
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Keep the BNC connector and signal board dry and clean.
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The protective liquid in the probe cap may crystallize over time; this is normal and does not affect performance.