Appendix 1: Specifications - Onset HOBOnode User Manual

Appendix 1: Specifications
Wireless Standard
Transmission Range
Maximum Number of HOBOnodes and
HOBOnode Repeaters
Maximum Number of HOBOnode
Repeaters in a series
Environmental Rating
HOBOnode and HOBOnode Repeater
Operating Range
HOBOnode Receiver Operating Range
HOBOnode Receiver Communication to PC
Measurement Range
Accuracy
Resolution
Response Time
Sample Rate
Battery Life
Size
Probe Dimensions
Probe Weight
System
Based on IEEE 802.15.4, 2.4 GHz ISM band (license‐free worldwide)
HOBOnodes to Receiver or Repeater:
150 to 300 m (500 to 1000 ft) with clear Line of Sight, typical
HOBOnode Repeater to Receiver or Repeater:
0.8 to 1.6 km (0.5 to 1 mile) with clear Line of Sight, typical
Any obstructions, such as crops, tree canopies, hills, walls, or heavy precipitation
will reduce these ranges significantly. The 2.4 GHz band used by HOBOnodes is
more susceptible to range reductions from obstructions than lower‐frequency
wireless signals.
50
4
HOBOnodes and HOBOnode Receiver: NEMA 6P, IP68
Temperature sensor probe is rated for 1‐year immersion in fresh water ≤ 50°C
(122°F)
HOBOnode Repeaters: NEMA 4X
‐20° to +50°C (‐4° to 122°F)
With optional Lithium Batteries: ‐40° to +50°C (‐40° to 122°F)
‐40° to +50°C (‐40° to 122°F)
1.8 m (6 ft) USB cable (can be extended with optional extension cable)
Temperature Sensor
‐40° to +100°C (‐40° to 212°F)
±0.21°C from 0° to +50°C (±0.38°F from
32° to +122°F)
See Temperature Accuracy Chart
below.
0.02° at 25°C:
(0.04°F at 77°F)
3 minutes in air moving 1m/s
30 seconds in water
1 reading per minute
1 year typical without solar charging
3 years typical with solar charging
16.5 cm x 5 cm; 3.7 m cable
(6.5 in x 2 in; 12 ft cable to sensor)
1 cm (0.38 in) diameter
180 grams (6.3 oz)
48
Soil Moisture
0 to 100% (0 to 1.0) volumetric water
3 3
content (m /m )
The sensor is capable of providing
readings outside the standard volumetric
water content range. This is helpful in
diagnosing sensor operation and
installation
3 3
3.1% (0.031) (m /m )
3 3
0.07% (0.0007) m /m
N/A
16.5 cm x 5 cm; 5 m cable
(6.5 in x 2 in; 16 ft cable to sensor)
89 x 15 x 1.5 mm
(3.5 x 0.62 x 0.06 in.)
180 grams (6.3 oz)
HOBOnode Outdoor Wireless System User's Guide