| Sensor |
| |
Temperature |
RH |
| Measurement Range |
-40°C to 75°C (-40°F to 167°F) |
0–100% RH at -40° to 75°C (-40° to 167°F); exposure to conditions below -20°C (-4°F) or above 95%
RH may temporarily increase the maximum RH sensor error by an additional 1% |
| 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) |
±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C (77°F);
below 10% and above 90% ±5% typical |
| Resolution |
0.02°C (0.036°F) |
0.01% RH |
| Drift |
<0.01°C (0.018°F) per year |
<1% per year typical |
| Response Time (typical, to 90% of change) |
Without solar radiation shield: 3 minutes,
45 seconds in air moving 1 m/sec
With RS3-B solar radiation shield: 6 minutes, 30 seconds in air moving 1 m/sec |
Without solar radiation shield: 15 seconds in air moving 1 m/sec
With RS3-B solar radiation shield: 30 seconds in air moving 1 m/sec |
| Wireless Mote |
| 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-THC-900: 904–924 MHz
RXW-THC-868: 866.5 MHz
RXW-THC-921: 921 MHz
RXW-THC-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 |
3 |
| 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: 5.1 x 33 mm (0.2 x 1.3 inches)
Cable length: 2 m (6.56 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches) |
| Weight |
Sensor and cable: 110 g (3.88 oz);
Mote: 223 g (7.87 oz) |
| Materials |
Sensor: Polyamide
Mote: PCPBT, silicone rubber seal |
| Environmental Rating |
Sensor: Weatherproof: 0 to 100% RH intermittent condensing environments. For best results, the sensor should be mounted inside a protective enclosure, such as a solar radiation shield. Mote: IP67, NEMA |
