Technical Information
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Sensor
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Measurement Range |
-40° to 100°C (-40° to 212°F) |
Accuracy |
±0.25°C from -40° to 0°C (±0.45°F from -40° to 32°F) ±0.20°C from 0° to 70°C (±0.36°F from 32° to 158°F) ±0.25°C from 70° to 100°C (±0.45°F from 158° to 212°F) |
Resolution |
0.02°C (0.036°F) |
Drift |
<0.01°C (0.018°F) per year |
Response Time (typical, to 90% of change) |
Without solar radiation shield: 2 minutes, 30 seconds in air moving 1 m/sec With RS3-B solar radiation shield: 5 minutes in air moving 1 m/sec |
Wireless Mote
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Operating Temperature Range |
-25° to 60°C (-13° to 140°F) with rechargeable batteries -40° to 70°C (-40° to 158°F) with lithium batteries |
Radio Power |
12.6 mW (+11 dBm) non-adjustable |
Transmission Range |
Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high Reliable connection to 609.6 m (2,000 ft) line of sight at 3 m (10 ft) high |
Wireless Data Standard |
IEEE 802.15.4 |
Radio Operating Frequencies |
RXW-TMB-900: 904–924 MHz RXW-TMB-868: 866.5 MHz RXW-TMB-921: 921 MHz RXW-TMB-922: 916–924 MHz |
Modulation Employed |
OQPSK (Offset Quadrature Phase Shift Keying) |
Data Rate |
Up to 250 kbps, non-adjustable |
Duty Cycle |
<1% |
Maximum Number of Motes |
Up to 50 wireless sensors or 336 data channels per one HOBO RX station |
Logging Rate |
1 minute to 18 hours |
Number of Data Channels |
2 |
Battery Type/ Power Source |
Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40° to 70°C (-40° to 158°F) |
Battery Life |
With NiMH batteries: Typical 3–5 years when operated in the temperature range -20° to 40°C (-4°F to 104°F) and positioned toward the sun (see Deployment and Mounting), operation outside this range will reduce the battery service life With lithium batteries: 1 year, typical use |
Memory |
16 MB |
Dimensions |
Sensor: 5.3 x 33 mm (0.2 x 1.3 inches) Cable length: 5 m (16.4 ft) Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches) |
Weight |
Sensor and cable: 82.5 g (2.91 oz) Mote: 223 g (7.87 oz) |
Materials |
Sensor: Stainless steel waterproof tip Mote: PCPBT, silicone rubber seal |
Environmental Rating |
Sensor and cable: Immersion in water up to 50°C (122°F) for 1 year Mote: IP67, NEMA 6 |