Leaf Wetness Smart Sensor (S-LWA-M003) Manual
9826-F MAN-S-LWA
The leaf wetness smart sensor is designed to work with HOBO® stations with its plug-in
modular connector. All calibration parameters are stored inside the smart sensor, which
automatically communicates configuration information to the station without the need for any
programming, calibration, or extensive setup. Unlike other leaf wetness sensors, the HOBO leaf
wetness smart sensor does not require any painting or coating—it is ready to use.
Specifications
Measurement Range
0 (dry) to 100% (wet)
Sensor Type
Capacitive grid
Interchangeability Between
Sensors (Over the Range
10–90% Wet)
±10%
Repeatability
±5%; see Note 1
Resolution
0.59%
Stability (Drift)
< ±5% per year (in typical growth conditions)
Service Life
3 years in typical growth conditions
Operating Temperature Range
-40°C to 70°C (-40°F to 158°F)
Environmental Rating
Weatherproof
Sensor Construction Materials
PVC housing, epoxy potting compound, nylon grommet, FR-4 circuit
board, PVC cable jacket
Bracket Materials
PVC mounting bracket, UV-stable nylon cable ties, zinc dichromate
plated steel U-bolts
Bits per Sample
8
Number of Data Channels*
1
Measurement Averaging Option
No
Dimensions
Sensor grid: 4.7 cm x 5.1 cm (1.8 in x 2.0 in)
Housing: 12.2 cm length x 1.8 cm diameter (4.8 in x 0.7 in)
Mounting bracket: 20 cm x 3 cm x 0.5 cm (8 in x 1.3 in x 0.2 in)
Weight (Sensor and Cable)
127 g (4.5 oz)
Weight (Including Mounting
Bracket)
290 g (10.2 oz)
Cable Length Available
3.0 m (9.8 ft)
Length of Smart Sensor
Network Cable*
3.0 m (9.8 ft)
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
* A single station can accommodate 15 data channels and up to 100 m (328 ft) of smart sensor cable (the digital
communications portion of the sensor cables).
Note 1 Given the nature of the sensor design and sensor operating frequency, the system has inherent susceptibilities to
Radio Frequency signals. The repeatability specification when subjected to certain RFI environments, such as
those outlined in IEC 61000-4-3 and IEC 61000-4-6, may be significantly reduced.
The system level repeatability will be particularly affected when placed in an electric field of 3 V/m or greater in
the 150 KHz to 1000 MHz range. RFI mitigation practices and physical deployment changes may reduce the
system susceptibility. If deployments are planned in high RFI energy environments, Onset recommends on-site
testing to determine system level repeatability.
Leaf Wetness Smart
Sensor
S-LWA-M003
Items Included:
•
Mounting bracket
•
U-bolt
•
Tie wraps