current position:home page>Products>Environmental Instrument>KEANLEY>

Jingli KL-S201 Soil water potential sensor

Updated:2025-11-06

Brand:Keanley
Model: KL-S201
Description: The Jingli KL-S201 soil water potential sensor adopts advanced sensing technology and six-point factory calibration, featuring outstanding measurement accuracy and stability.
Data download

Feedback
WeChat

QQ

Online Service

Product Details

Jingli KL-S201 Soil Water Potential Sensor Introduction

KL-S201 User Manual

The Jingli KL-S201 Soil Water Potential Sensor utilizes advanced sensing technology and six-point factory calibration, delivering outstanding measurement accuracy and stability. Unlike traditional water content sensors, it not only indicates how much water is in the soil but also determines whether this water is available for plant uptake and its movement trends. Furthermore, this sensor is not limited by soil type, supports data comparison across different regions, and greatly expands its application scenarios.

Core Features

Full-Range Measurement: Covers -5 kPa to -100,000 kPa, reliably measuring from wet to air-dry conditions.

High Precision Sensing: Six-point calibration ensures accurate readings, with an accuracy of ±(10% of reading + 2 kPa).

Rugged and Durable: Epoxy coating provides protection, adapting to harsh environments and resisting freezing.

Plug-and-Play: Supports the SDI-12 communication protocol for easy integration into various data acquisition systems.

Low Power Design: Typical operating current is only 5mA, ensuring energy efficiency.

Synchronized Temperature Monitoring: Built-in temperature sensor with a range of -40°C to 80°C, suitable for various climatic conditions.

Technical Specifications

Parameter Category	Item	Specification Description
Measurement Specifications	Water Potential	Range: -85 ~ 50 kPa
		Resolution: 0.01 kPa
		Accuracy: ±(10% of reading + 2 kPa) from -100 to -5 kPa
		Note: KL-S201 readings on the wetting path can reach up to 0 kPa. Air entry into the soil limits sensor performance to -5 kPa on the drying curve.
	Temperature	Range:-40.00~80.00 °C
		Resolution: 0.10 °C
		Accuracy: ±1.00 °C
	Dielectric Measurement Frequency	70 MHz
Communication Specifications	Output	DDI Serial or SDI-12 Communication Protocol
Communication Specifications	Data Logger Compatibility	METER ZL6, EM60, and Em50 data loggers, or any data acquisition system supporting 3.6 to 15 VDC power and serial or SDI-12 communication
Physical Specifications	Dimensions	Length: 9.6 cm Width: 3.5 cm Height:1.5 cm
	Sensor Diameter	3.2 cm (1.3 inches)
	Operating Temperature Range	Minimum: -40.00°C Maximum: 80.00°C
	Operating Temperature Range	Note: Under certain conditions, the sensor may be used at higher temperatures; contact customer support for assistance.
	Cable Length	5m (Standard) 75 m (Maximum custom cable length)
	Connector Type	3.5 mm Stereo Jack Connector or Stripped and Tinned Wires
Electrical & Timing Characteristics	Supply Voltage (VCC to GND)	Minimum: 3.6 VDC Maximum: 15.0 VDC
	Digital Input Voltage (Logic High)	Minimum: 2.8 V Typical: 3.6V Maximum: 5.0 V
	Digital Input Voltage (Logic Low)	Minimum: -0.3 V Typical: 0.0V Maximum: 0.8V
	Power Line Slew Rate	Minimum: 1.0 V/ms
	Current Consumption (During Measurement)	Minimum: 3.0 mA Typical: 5.0 mA Maximum: 16.0 mA
	Current Consumption (During Sleep)	Minimum: 0.0 mA
	Power-up Time (DDI Serial)	Maximum: 50 ms
	Power-up Time (SDI-12)	Typical: 175 ms
	Measurement Duration	Typical: 175 ms
Other	Compliance	Manufactured according to ISO 9001:2015 EM ISO/IEC 17050:2010 (CE Mark)

Application Scenarios

The KL-S201 is suitable for：

Farmland Irrigation Management

Greenhouse Planting Environment Monitoring

Eco-hydrological Research

Geological Disaster Early Warning (e.g., Landslide Monitoring)

Campus and Scientific Research/Experimental Teaching

The KL-S201 Soil Water Potential Sensor, with its comprehensive measurement range, reliable accuracy, and good system compatibility, is a practical choice in the field of soil moisture monitoring. Whether used for scientific research or production management, it helps users better understand the soil-plant-water relationship, providing strong support for achieving precise water use and efficient agriculture.

PREVIOUS：Jingli Keanley KLS-3150 Soil Moisture/Tempera NEXT：Jingli KL-SCT12 Soil Moisture and Temperature