Soil NPK Sensor with RS485 Communication

lahiru Dhananjaya — Mon, 03 Oct 2022 16:15:22 +0000

LK Tronics
Soil NPK Sensor with RS485 Communication

Soil NPK Sensor with RS485 Communication

General Specifications

Model: Soil NPK RS 485 Sensor
Type: Multi-parameter Soil Sensor
Communication Interface: RS 485 (Modbus RTU Protocol)
Power Supply: DC 5V-12V
Operating Temperature: -40°C to 85°C
Humidity Range: 0% to 100% RH
Dimensions: Varies by manufacturer (typically around 100mm x 50mm x 25mm)

Measurement Parameters

NPK (Nitrogen, Phosphorus, Potassium)
- Measurement Range:
  - Nitrogen: 0-2000 mg/kg
  - Phosphorus: 0-2000 mg/kg
  - Potassium: 0-2000 mg/kg
- Resolution: 1 mg/kg
- Accuracy: ±5% of reading
- Sensing Technology: Electrochemical or Optical depending on the model
pH Measurement
- Measurement Range: 0 to 14 pH
- Resolution: 0.01 pH
- Accuracy: ±0.1 pH
- Calibration: Requires calibration with standard buffer solutions
Temperature Measurement
- Measurement Range: -40°C to 85°C
- Resolution: 0.1°C
- Accuracy: ±0.5°C
Humidity Measurement
- Measurement Range: 0% to 100% RH
- Resolution: 1% RH
- Accuracy: ±3% RH

Features

Data Logging: Supports data logging for historical data analysis.
Real-Time Monitoring: Provides real-time readings for immediate feedback.
Environmental Protection: Waterproof and dustproof design (IP68 rating).
Compatibility: Compatible with various agricultural and environmental monitoring systems.
Calibration: User-friendly calibration process for accurate readings.
LED Indicators: Status LED for power and communication status.

Physical Specifications

Housing Material: Durable ABS or PVC
Weight: Approximately 200g
Cable Length: The standard cable length is 2 meters; customizable options are available.

Application Areas

Agriculture: Soil nutrient monitoring for precision farming.
Environmental Research: Soil analysis for ecological studies.
Horticulture: Optimizing conditions for plant growth.
Hydroponics: Managing nutrient levels in soilless systems.

Data Output

Output Format: RS 485 Modbus RTU protocol; can output data in various formats (e.g., CSV, JSON).
Sampling Rate: 1 reading per second (adjustable).

Installation and Maintenance

Installation: Easy installation with a user manual included.
Maintenance: Regular calibration is recommended; clean sensor electrodes to maintain accuracy.

Power supply	DC4.5-30V
Max Power consumption	0.5W@24V DC
Protection class	IP68, long-term immersion in water use
Cable length	The default is 2m (can be customized)
Operating environment	-40℃-80℃
Overall dimensions	45* 15 * 123mm
Output	RS485/4-20mA/0-5V/0-10V

Soil parameters measuring

Measure items	Parameters
Temperature	Measuring range: -40℃-80℃ Accuracy: ±5℃ (25℃) Long-term stability: ≤0.1%℃/y Response time: ≤15s
Humidity	Measuring range: 0-100%RH Accuracy: 2% within 0-50%, 3% within 50-100% Long-term stability: ≤1%RH/y Response time: ≤4s
PH	Measuring range: 3-9 PH Accuracy: ±0.3PH Long-term stability: ≤5%/year Response time: ≤10S

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Soil NPK Sensor with RS485 Communication
lahiru Dhananjaya

TTL to RS485 Power Supply Converter Board

Ashen Premathilake — Thu, 02 Jan 2020 10:36:05 +0000

LK Tronics
TTL to RS485 Power Supply Converter Board

TTL to RS485 Power Supply Converter Board

This transmitter module implements the mutual conversion between TTL signal and RS485 signal, but we must be mindful that 485 is a half-duplex communication, which can achieve two-way communication, but not in both directions at the same time; it must be carried out alternately. In other words, each section of the communication channel can be the sender or the receiver, but at the same time, information.

There can only be one transmission direction.It realizes the automatic flow control of RS485 signal and the automatic switching of receiving and receiving directions. It is as simple to use this module as you operate the serial port.

Baud rate: 110-256000 BPS.

Features:

Wide voltage supply (3.0V~30V), limit voltage 33V, recommended to use within 30V, the minimum voltage should be higher than 2.8V.

Compatible with 3.3V and 5.0V signals, both can match the module.

Excellent EMC and EMI performance.

Strong anti-jamming ability, and strong 485 lightning protection design, working temperature is – 40 C to + 85 C.

With terminal and silicone wire, it is very convenient to use.

With RXD and TXD signal indicators.

This module fully considers the lightning protection design and anti-interference design of 485 bus. It has very high EMC (electromagnetic compatibility) and EMI (electromagnetic anti-interference) performance. When long-distance transmission in the field, connecting the “earth” end of the module to the earth can play a very good anti-interference and anti-lightning role, making 485 bus safer; indoor short-distance transmission can not access the earth.

With standard 2.54 spacing needle arrangement, it is convenient for your secondary development.

With 120 Euro matching resistance, short R0 can make matching resistance possible, and short R0 is recommended for long-distance transmission.

Supporting multi-machine communication, the same network can connect at least 40 nodes.

Hot plugging can be done without signal blocking.

Anti-interference routing and copper laying to prevent interference of signals.

Package included:

1 x TTL to RS485 Module
1 x Cable

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TTL to RS485 Power Supply Converter Board
Ashen Premathilake

RS485 | LK Tronics

Soil NPK Sensor with RS485 Communication

Soil NPK Sensor with RS485 Communication

General Specifications

Measurement Parameters

Features

Physical Specifications

Application Areas

Data Output

Installation and Maintenance

TTL to RS485 Power Supply Converter Board

TTL to RS485 Power Supply Converter Board

Features:

Package included: