HOBOnet Wireless Temperature Sensor

Data Loggers

HOBOnet Wireless Temperature Sensor

  • Vendor:Onset

Availability: Available Item
Qty Price
Buy 1 $280.00 ea
Buy 10 $266.00 ea

A complete system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager (RXMOD-RXW-xxx), and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RX-RPTR-xxx) can be added to extend the range.


The HOBOnet Wireless Temperature Sensor provides a cost-effective and scalable solution for web-enabled monitoring of air temperature. HOBOnet wireless sensors communicate data directly to a HOBO RX Station or pass data through other wireless sensors back to the central station. They are preconfigured and ready to deploy, and data is accessed through HOBOlink, Onset’s innovative cloud-based software platform.

Highlighted Features

Sensor Features

  • Measurement range of -40° to 100°C (-40° to 212°F)
  • High accuracy: ± 0.2°C ( ± 0.36°F)
  • Stainless-steel sensor tip

Wireless Features

  • 900 MHz wireless mesh self-healing technology
  • 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
  • Up to 50 wireless sensors or 336 data channels per HOBO RX station
  • 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

In what environment does this sensor operate?

This sensor operates in an indoor environment.

What measurements does this sensor support?

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


Measurement Range

-40° to 100°C (-40° to 212°F)


±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)


0.02°C (0.036°F)


<0.01°C (0.018°F) per year

Response Time (typical, to 90% of change)

2 minutes, 30 seconds in air moving 1 m/sec

Wireless Mote

Operating Temperature Range

-40° to 70°C (-40° to 158°F)

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-x-900: 904–924 MHz
RXW-TMB-x-868: 866.5 MHz
RXW-TMB-x-921: 921 MHz
RXW-TMB-x-922: 916–924 MHz

Modulation Employed

OQPSK (Offset Quadrature Phase Shift Keying)

Data Rate

Up to 250 kbps, non-adjustable

Duty Cycle


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


Battery Type

Two AA 1.5 V lithium batteries

Battery Life

1 year, typical use


16 MB


Sensor: 5.1 x 33 mm (0.2 x 1.3 inches)
Cable length: 0.3 m (1 ft), RXW-TMB-1-xxx; 1.8 m (6 ft), RXW-TMB-6-xxx
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)


Sensor and cable: 7.6 g (0.27 oz), RXW-TMB-1-xxx; 35.2 g (1.24 oz), RXW-TMB-6-xxx
Mote: 223 g (7.87 oz)


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