Meteorological & Soil Sensors

Compatible with any of the U30, RX3000, Micro station or Energy Logger models

Barometric Pressure

There are two options for measuring barometric pressure, one sensor is designed to be installed inside the weather station enclosure, while the other can be mounted outside.

Both sensors measure in the range 660 mb to 1070 mb.

Leaf Wetness

The Leaf Wetness Smart Sensor provides accurate leaf wetness data in a number of growing and research applications.
The sensor is ready to use and does not require any painting or coating. It uses a capacitive grid that is less sensitive to surface residues than resistive grid-based sensors, and comes preconditioned for consistent measurements between sensors and for long-term stability. Along with a 3-meter cable, a mounting bracket is included so the sensor can be easily positioned to mimic the wet-dry characteristics of the plants being studied.


This Rainfall Smart Sensor (Metric system) measures up to 10 cm of rain per hour with a resolution of 0.2 mm, and a maximum of 4000 tips per interval.
This smart sensor has a response range of 0° to 50°C and sustains sensor survival from -40° to 75°C. The mechanism is tipping bucket mounted on a stainless steel shaft with brass bearings. This model includes a 2m cable.

Soil Moisture

Measure soil water content with the affordably-priced Soil Moisture Smart Sensor; this sensor integrates the field-proven ECH2O Sensor and a 12-bit A/D, providing ±3% accuracy in typical soil conditions, and ±2% accuracy with soil-specific calibration.
The sensor's two-tine design makes the sensor easy to install. Readings are provided directly in volumetric water content. This sensor's high frequency design gives it a relatively low sensitivity to salinity and temperature effects and a wide measurement range.

Solar Radiation

There are 2 solar radiation sensors, one the measures the full range of visible light, the other measures only those wavelengths that plants respond to.

  • Pyranometer
The Solar Radiation Smart Sensor is a light sensor (silicon pyanometer) with a measurement range of 0 to 1280 W/m2 over a spectral range of 300 to 1100 nm.
This sensor reports the average light intensity over a user-set set logging interval from a minumum of 1 second. Although the azimuth error is only ±2% error at 45° from vertical, a light sensor bracket and light sensor level are recommended.
  • Photosynthetic Light
The Photosynthetic Light (PAR) Smart Sensor is intended to measure light intensity for the frequencies relevant for photosynthesis.
This sensor has a measurement range of 0 to 2500 umol/m2/sec over wavelengths from 400 to 700 nm. Enclosed in a anodized aluminum housing with acrylic diffuser and o-ring seal, this model has a 3m cable; a light sensor bracket and light sensor level are recommended.


HOBO S-TMB 12-bit Temperature Smart Sensors with Stainless steel sensor tip

  • Available with 2m, 6m or 17m cable length
  • < ± 0.2° C total accuracy over the range of from 0° to 50° C
  • Resolution of < ± 0.03° C
  • Full measurement range is -40° to 100° C
  • Stainless steel sensor tip and robust cable rated for immersion in water up to 50° C for up to 1 year


Temperature & Humidity

The S-THB 12-bit Temperature/RH Smart Sensor is designed to work with all Onset data loggers that accept Smart Sensors.

  • Range: -40° to 75°C and 0 to 100% RH between 0° to 50°C
  • Accuracy: 0.2°C over 0° to 50°C; RH: +/- 2.5% from 10% to 90% RH (typical), to a maximum of +/- 3.5%.
  • Resolution: Temp: 0.02°C at 25°C; RH: 0.1% RH at 25°C
  • A radiation shield is strongly recommended for use in sunlight.
  • Available with 2m or 8m cable.

Wind Direction

The S-WDA-M003 is a highly-durable wind vane with a drip overhang for anti-icing. Its shielded stainless-steel ball bearings and static-dissipating housing provide a long sensor life. The sensor calculates a unit vector average of the wind direction, providing data directly in degrees.Output is 0-355 degres with a 5 degree dead-band at North.

Wind Speed

The S-WSA-M003 Wind Speed Smart Sensor is a 3 cup anemometer with TEFLON bearings and hardened beryllium shaft designed to measure wind speed from 0 to 45 m/s (0 to 100 mph). This smart sensor provides data reporting average wind speed and highest 2 second gust for each logging interval. The starting threshold for this instrument is only 1 m/s; instrument survives through 120 mph. This model comes with a 3m cable.

UltraSonic Wind Speed & Direction

The Ultrasonic Wind Speed and Direction Smart Sensor is compact and rugged with no moving parts. Because this sensor is ultrasonic it is able to measure very low wind speeds, down to 0.4 m/s (compared to 1.0 m/s for our mechanical sensors). Because it is automatically recognized by HOBO stations, there is no need for programming, resulting in fast and easy deployment. The sensor is powered by its own built-in solar panel.

Related Pages

HOBO H22-001 Energy Logger

Home > Products > Onset - HOBO Dataloggers > HOBO Indoor Dataloggers > HOBO Energy Logger System  

HOBO RX3000 Telemetered Datalogger

Home > Products > Onset - HOBO Dataloggers > HOBO Outdoor Dataloggers  

HOBO U30 Monitoring System

Home > Products > Onset - HOBO Dataloggers > HOBO Outdoor Dataloggers  

Temperature & Humidity Sensors

Home > Products > Onset - HOBO Dataloggers > HOBO Outdoor Dataloggers > Smart Sensors for HOBO Datalogging Systems