Industrial Soil pH Sensor, 3–9 pH, RS485/Analog Output

Need reliable soil pH data without a complicated setup? ATO soil pH sensor delivers accurate (±0.3 pH) real-time monitoring with a durable IP68 probe—perfect for agriculture, irrigation, and smart farming systems.

Technical Specifications

Features & Benefits

• Corrosion-Proof 316SS Probe: Built with 316 Stainless Steel & Special Alloy to eliminate soil pH sensor data drift and resist rust in long-term burial within acidic or alkaline clay.
• IP68 Vacuum-Sealed Body: Features a vacuum-sealed flame-retardant epoxy body for 100% IP68 waterproof protection against water and fertilizers in greenhouses and extreme fields.
• Anti-Interference Smart Chip: High-sensitivity, low-power consumption (≤0.4W) chipset ensures a stable soil pH signal and reliable data for automated irrigation systems.
• Universal RS485 & Analog Output: A digital soil acidity sensor supporting RS485 Modbus RTU and 4-20mA / 0-10V for seamless integration with 95% of global IoT gateways.

Size (unit: mm)

Wiring

Wiring for Transmitter Output

Wiring for RS485 Output

Note: Actual wiring colors may differ; always follow the manual or label provided with the sensor.

Typical Applications

1. Precision Agriculture & Fertigation: Integrate with smart irrigation systems to prevent nutrient lockout and optimize crop yield.
2. Soil Remediation Projects: A rugged corrosion-resistant soil pH probe for saline soil recovery and environmental tracking.
3. Smart Greenhouse Management: High-frequency, maintenance-free soil pH monitoring for hydroponics and substrate-based growing.
4. Landscape & Turf Care: The preferred industrial soil pH meter for golf course maintenance and urban greening.

Note: While highly versatile, this soil sensor is designed for soil and solid substrates. It is not recommended for pure liquid hydroponics or highly rocky terrain, where the probes might be physically bent during insertion.

pH Sensor for Agriculture

pH Sensor for Irrigation Systems

pH Sensor for Greenhouse Monitoring

Technical Comparison

This helps justify the premium quality of the ATO soil sensor (NPK sensor & PH sensor).

Soil pH Sensor ATO-OHR-MT60: The Ultimate Field-Ready Solution

Why Choose the MT60 Series? Select the scenario that matches your field challenges:

1. Is your soil pH data drifting? It's time for a "Hardcore" core.

Many IoT projects fail because low-end chips can't handle field electromagnetic interference. ATO-OHR-MT60 PH sensor can help you.

• High-Sensitivity Chip: Features a built-in anti-interference processor with low power consumption (≤0.4W).
• Precision Control: Accuracy of ±0.3 pH with 0.1 pH resolution—perfect for precision fertigation.
• Universal Compatibility: Seamless integration with PLCs, MCUs, or Cloud Gateways via RS485 (Modbus RTU) or analog outputs (4–20mA / 0–5V / 0–10V).
• Pro Tip: Don't just look at the price; stable signal transmission saves you countless hours of on-site troubleshooting.

2. Saline soil or freezing temperatures? The 316 Stainless Steel Alloy probe is built for the tough stuff.

Standard pH probes often suffer from electrolysis and corrosion in salty or high-fertilizer environments. ATO soil PH sensors are free from such problems.

• Durable DNA: Probes are crafted from 316 Stainless Steel + Special Alloy, offering exceptional rust resistance and anti-electrolysis properties.
• IP68 Protection: Fully sealed with vacuum epoxy resin, ensuring the device operates underwater or buried in damp greenhouses indefinitely.
• Extreme Temp Range: Reliable performance from -20°C to 60°C—from northern frost to tropical orchards.
• Pro Tip: For outdoor sensors, IP68 + 316 Stainless Steel is the "Golden Standard" for a one-time, long-term investment.

3. Ready for automated fertilization? Meet your 24/7 "Soil Sentinel."

Manual soil testing is too slow for modern fertigation. Choosing the ATO-OHR-MT60 PH sensor is the right choice.

• Plug-and-Play Installation: The sleek 133mm direct-insertion design and customizable cable (default 2m) allow for rapid deployment without major soil disruption.
• Remote Management: Real-time pH tracking via your smartphone when integrated into your smart ag-system.
• Certified Reliability: CE Certified with a 12-month warranty. The cost-effective choice for large-scale agricultural deployment.
• Pro Tip: Smart farming is "Data-Driven." The first step is a sensor that stays in the ground and talks to your server 24/7.