HOBOnet Temp Sensor (air, soil, and water)

Highlighted Features

Sensor Features
Measurement range of -40° to 100°C
High accuracy: ± 0.2°C
Stainless-steel sensor tip
Sensor and cable rated for immersion in water or soil up to 50°C for up to 1 year

Wireless Features
868 MHz wireless mesh self-healing technology
450 to 600 meter wireless range
Up to 50 wireless sensors per RX3000
Simple button-push to join the HOBOnet wireless network
Onboard memory to ensure no data loss
Powered by rechargeable AA batteries and built-in solar panel

The RXW-TMB-xxx sensor supports the following measurements: Air Temperature, Soil Temperature, Temperature and Water Temperature

Sensor

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
(to 90% of step 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

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-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

50 motes per one RX Wireless Sensor Network

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: 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

Compliance Marks

RXW-TMB-900
RXW-TMB-868
RXW-TMB-922