INFWIN SlabSense Substrate Moisture, EC and Temperature Sensor

$ 189.00 USD

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INFWIN P/N SlabSense-AAAB002

Quantity

SKU:123004230

Out of stock — Available on backorder

The INFWIN SlabSense is a substrate/soil moisture, EC (electrical conductivity), and temperature sensor purpose-built for hydroponic substrates such as rockwool and coco peat, as well as soil. Its resin-sealed plastic body with sensing rods inserts directly into the substrate or soil for long-term in-situ measurement. Output interface, connector type, and cable length are configurable via ordering code - the default variant (SlabSense-AAAB002) ships with Substrate Moisture, EC & Temperature measurement, RS485/Modbus-RTU output, 3.9–28V DC supply, a cold-pressed terminal connector, and a 2 m cable.

An optional variant adds an air humidity, temperature, and vapor pressure deficit (VPD) sensor for greenhouse climate control - VPD is a more reliable predictor of plant transpiration and water loss than relative humidity, and is commonly used to hold a target deficit (greater than 0.5 kPa) that lets plants transpire effectively while limiting foliar disease. Reverse power protection and built-in TVS/ESD protection are included.

Key Features

Triple measurement: Substrate/soil volumetric water content (VWC), EC, and temperature in a single probe
Dual moisture output: Reports both volumetric water content (VWC) and apparent dielectric permittivity
Optional VPD add-on: Air humidity, air temperature, and vapor pressure deficit measurement for greenhouse control (Code 2 = B) - reduces IP rating to IP50
Digital sensor: Communicates over SDI-12 or RS485 (Modbus-RTU), selectable via ordering code
Low-power design: RS485 quiescent current <4 mA; SDI-12 quiescent current <30 µA - suited to battery-powered dataloggers
Low salinity sensitivity
Robust epoxy encapsulation: Resists corrosive environments
Reverse power protection: Built-in TVS/ESD protection
Connector options: Cold-pressed terminal or stripped & tinned lead wires
Configuration utility: SensorOneSet software (RS485) or SensorOneSetSDI12 software (SDI-12) included for sensor configuration
Cable length: 2 m standard; custom lengths available

Applications

Smart agriculture, hydroponics, and horticulture
Greenhouse monitoring
Soil/substrate water balance studies
Irrigation management
Solute/fertilizer movement tracking
Reference evapotranspiration calculations
LoRaWAN IoT deployments via the Catena-5310 or compatible RS485/Modbus-RTU gateway

Important Notes

The Air Humidity & Temperature & VPD add-on (Code 2 = B) reduces the sensor's IP rating from IP68 to IP50 - it is not fully sealed against submersion.
The sensor rods are sharp for ease of insertion - handle with care and follow installation precautions.
Do not pull the sensor out of soil or substrate by its cable.
VWC range and calibration are media-dependent; a custom factory calibration can be requested for specific substrates.
When using RS485 Active Output mode, only one sensor should be on the network to avoid data collision.

Specifications

Substrate Moisture
Apparent dielectric permittivity range	1–81 (air to water)
Permittivity resolution	0.1 (1.00–40.00 range); 0.5 (40.00–81.88 range)
Permittivity accuracy	±1 (1.00–40.00 range); ±10% of reading (40.00–81.00 range)
VWC range	0–100% (media-dependent; custom calibration available)
VWC resolution	0.1%
VWC accuracy	±3%
Substrate EC (Electrical Conductivity)
Range	0–20 dS/m
Resolution	0.01 dS/m
Accuracy	±5% of reading (0–7 dS/m); ±10% of reading (7–20 dS/m)
Temperature compensation	0–50°C
Substrate Temperature
Range	−40°C to +80°C
Resolution	0.1°C
Accuracy	±0.5°C
Air Humidity/Temperature/VPD (optional add-on, Code 2 = B only)
Air humidity range	0–100%, resolution 0.1%, typical accuracy ±1.8% RH
Air temperature range	−40°C to +80°C, resolution 0.1°C, typical accuracy ±0.2°C
Electrical
Output interface	RS485 (Modbus-RTU) or SDI-12, V1.3 (selectable via ordering code)
Power supply	3.9–28V DC
Quiescent current	RS485: <4 mA; SDI-12: <30 µA
Measuring current	<20 mA during 150 ms measurement
Mechanical
Dimensions	90 × 55 × 75 mm
Sealing	Epoxy resin
IP rating	IP68 (without Air Humidity/Temperature/VPD); IP50 (with Air Humidity/Temperature/VPD)
Connector	Cold-pressed terminal or stripped & tinned lead wires (selectable via ordering code)
Cable length	2 m standard; custom length available
Installation	Surface or buried
Environmental
Operating temperature	−40°C to +80°C

Ordering Code Guide

Code 1: Product Series	SlabSense	SlabSense Substrate Moisture, EC, Temperature Sensor
Code 2: Measuring Parameters	A B	Substrate Moisture & EC & Temperature Substrate Moisture & EC & Temperature with Air Humidity & Temperature & VPD
Code 3: Power Supply	A	3.9–28V DC
Code 4: Output Interface	A B	RS485 (Modbus-RTU) SDI-12
Code 5: Connector	B C	Cold-pressed terminal Stripped & tinned lead wires
Code 6: Cable Length	002 XXX	2 meters Custom (XXX = length in meters, e.g. 005 = 5 m)

Default Variant: SlabSense-AAAB002

Measuring parameters	Substrate moisture (VWC), EC, and temperature
Power supply	3.9–28V DC
Output interface	RS485, Modbus-RTU
Connector	Cold-pressed terminal
Cable length	2 meters

Custom variants (measuring parameters, output interface, connector, cable length, substrate calibration) are available - contact us to discuss your requirements.