Product Overview
The OHTS1023 is a soil acidity detection sensor based on electrochemical principles. It utilizes a zinc-aluminum alloy probe to convert hydrogen ion activity in soil into analog voltage, current loop, or digital signal outputs. The sensor features a fully sealed structural design, enabling direct burial into soil for long-term in-situ monitoring across various soil types.
With high measurement accuracy, fast response time, and excellent interchangeability, this sensor delivers reliable pH monitoring for dynamic soil analysis. The compact design facilitates field deployment and system integration, making it an ideal choice for professional agricultural and environmental monitoring applications.
Designed for harsh outdoor conditions, the OHTS1023 operates effectively in temperatures ranging from -30 ~ 70°C with minimal influence from soil composition. Its robust construction and multiple output options provide flexibility for integration with various data loggers and control systems.
Features
- Electrochemical measurement principle with zinc-aluminum alloy probe for accurate hydrogen ion detection
- Fully sealed protective structure resistant to acid and alkali corrosion, supporting long-term burial
- Multiple signal output interfaces: analog voltage (0 ~ 2V/0 ~ 5V/0 ~ 10V), current loop (4 ~ 20mA), and RS485 digital bus (Modbus-RTU)
- High measurement accuracy (±1), fast response speed, and good interchangeability between probes
- Wide adaptability to soil types with minimal influence from soil composition
- Compact structural design with small footprint for easy field deployment
- Wide operating environment: -30 ~ 70°C temperature and ≤100% RH humidity
- Low power consumption (≤0.5W) suitable for continuous monitoring applications
Applications
- Greenhouse soil environment monitoring and regulation
- Substrate pH detection for floriculture and vegetable cultivation
- Soil quality assessment for grasslands and pastures
- Soil surveys in forestry ecological research
- On-site soil testing for geological exploration
- Substrate monitoring in plant cultivation scientific experiments
- Water quality monitoring in irrigation systems
- Soil assessment at contaminated environmental sites
- Soil nutrient management in precision agriculture
- Nutrient solution monitoring in soilless horticultural cultivation
Technical Specifications
Measurement Parameters
| Parameter | Range | Accuracy | Resolution | Stability |
|---|---|---|---|---|
| pH Value | 3 ~ 10 | ±1 | 0.01 | ≤0.02/24h |
Electrical Characteristics
| Parameter | Specification |
|---|---|
| Supply Voltage | 7 ~ 24V DC (for 0 ~ 2V voltage output or RS485 output) 12 ~ 24V DC (for 0 ~ 5V/0 ~ 10V voltage output or 4 ~ 20mA current output) Customizable 3.3 ~ 5V DC |
| Power Consumption | ≤0.5W |
| Output Signal | Voltage output: 0 ~ 2V DC, 0 ~ 5V DC, 0 ~ 10V DC (select one) Current output: 4 ~ 20mA Digital output: RS485 (Standard Modbus-RTU protocol, default address 0x01) |
| Operating Environment | Temperature: -30 ~ 70°C; Humidity: ≤100%RH |
Current Signal Load Capacity
| Supply Voltage | 9V DC | 12V DC | 20V DC | 24V DC |
|---|---|---|---|---|
| Maximum Impedance | 125Ω | 250Ω | 500Ω | >500Ω |
Physical Specifications
The sensor employs a zinc-aluminum alloy probe and sealed housing structure, supporting long-term burial in soil. Please refer to the dimensional drawing for specific structural dimensions. The compact design ensures minimal soil disturbance during installation while maintaining robust mechanical integrity for continuous underground operation.
FAQ
Q: What is the measurement principle of the OHTS1023?
A: The sensor uses electrochemical principles with a zinc-aluminum alloy probe to convert hydrogen ion activity in soil into analog voltage, current loop, or digital signals.
Q: What output signal options are available?
A: The sensor supports analog voltage outputs (0 ~ 2V, 0 ~ 5V, or 0 ~ 10V), 4 ~ 20mA current loop, and RS485 digital bus with Modbus-RTU protocol.
Q: What is the protection level and installation method?
A: The sensor features a fully sealed structural design resistant to acid and alkali corrosion, enabling direct burial into soil for long-term in-situ monitoring.
Q: What are the power supply requirements?
A: The sensor requires 7 ~ 24V DC for 0 ~ 2V voltage output or RS485 output, and 12 ~ 24V DC for 0 ~ 5V/0 ~ 10V voltage output or 4 ~ 20mA current output. Customizable 3.3 ~ 5V DC is also available.
Q: What precautions should be taken during installation?
A: Do not insert the probe into stones or hard soil clumps to prevent damage. When removing, grasp the housing rather than pulling the cable. Ensure tight contact between probe and soil for accurate measurements.