HOBOnet is a cost-effective, scalable, user-friendly wireless sensor network that lets you streamline data retrieval by effortlessly monitoring multiple wells with a single cellular device. Data is accessed from anywhere, at any time, through the customizable dashboard in HOBOlink, Onset's innovative cloud software platform – eliminating the need for frequent site visits that are both time-consuming and costly. HOBOlink also sends automatic, real-time text/email notifications to alert you of any sensor or system alarms, providing the insights you need to make informed decisions, react quickly to stay ahead of issues, and ensure compliance.


Other key benefits:

• User-friendly setup process
• A proven water level sensor for accurate, reliable readings
• Rechargeable batteries and built-in solar panel eliminate downtime
• Real-time insights via customized dashboards in HOBOlink, leaving delays in the past
• No data loss due to user error, with temperature-compensated pressure readings for accurate, reliable information
• HOBOlink cloud dashboards for in-depth data analysis and smarter decision-making
• Kevlar-reinforced cable with integrated strain relief mechanism

Features

Sensor Features

• Non-vented design reduces maintenance
• Durable, ceramic sensor can withstand freezing
• 3-point NIST-traceable calibration certificate

Wireless Features

• Sub-GHz wireless mesh self-healing technology for expansive coverage
• 450 to 600 meter wireless range and up to five hops
• Up to 50 wireless sensors or 336 data channels per one 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

Specifications

Wireless Mote


Operating Temperature Range:  -25° to 60°C with rechargeable batteries; -40° to 70°C with lithium batteries
Radio Power: 12.6 mW (+11 dBm) non-adjustable
Transmission Range: Reliable connection to 457.2 m line of sight at 1.8 m high; Reliable connection to 609.6 m line of sight at 3 m high
Wireless Data Standard: IEEE 802.15.4
Radio Operating Frequencies:
    RXW-WL-900: 904–924 MHz
    RXW-WL-868: 866.5 MHz
    RXW-WL-921: 921 MHz
    RXW-WL-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: 4 (Water Level, Differential Pressure, Water Temperature, Barometric Pressure)
Battery Type / Power Source: Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar panel or two AA 1.5 V non-rechargeable lithium batteries for operating conditions of -40 to
Battery Life:  With NiMH batteries: Typical 3–5 years when operated in the temperature range -20° to 40°C and positioned toward the sun, operation outside this range will reduce the battery service life. With non-rechargeable lithium batteries: 1 year, typical use
Memory: 16 MB
Dimensions: Interface Connector Diameter: 25.4 mm. Cable length: 1.83 m. Mote: 16.2 x 8.59 x 4.14 cm
Weight: 229 g (8.08 oz)
Materials: Sensor: Polycarbonate housing encasing epoxy sealed circuit board. Cable: Polyurethane. Mote: PCPBT, silicone rubber seal
Environmental Rating: Mote: IP67, NEMA 6
FCC Compliance Mark: RXW-WL-900
CE Compliance Mark: RXW-WL-868
Taiwan Compliance Mark: RXW-WL-921
Australia New Zealand Compliance Mark: RXW-WL-922

Water Level Sensor

See referenced below:
    * Water Level Accuracy: With accurate reference water level measurement, known water density, & a stable temp environment. System Water Level Accuracy equals the sum of the Barometric Water Level Accuracy plus the selected sensor end Water Level Accuracy.
    ** Raw Pressure Accuracy: Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors.
    ***Changes in Temperature: Allow 20 minutes in water to achieve full temperature compensation of the pressure sensor. Can be up to 0.5% of additional error due to rapid temperature changes. Measurement accuracy also depends on temperature response time.

Pressure (Absolute) and Water Level Measurements MX2001-01-SS-S and MX2001-01-Ti-S

Operation Range: 0 to 207 kPa; approximately 0 to 9 m of water depth at sea level, or 0 to 12 m of water at 3,000 m of altitude
Factory Calibrated Range: 69 to 207 kPa, 0° to 40°C
Burst Pressure: 310 kPa or 18 mdepth
Water Level Accuracy*: Typical error: ±0.05% FS, 0.5 cm water. Maximum error: ±0.1% FS, 1.0 cm water
Raw Pressure Accuracy**:  ±0.3% FS, 0.62 kPa (0.09 psi) maximum error
Resolution: <0.02 kPa (0.003 psi), 0.21 cm water
Pressure Response Time (90%)***: <1 second at a stable temperature

Pressure (Absolute) and Water Level Measurements MX2001-02-SS-S

Operation Range: 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m of water depth at sea level, or 0 to 33.6 m of water at 3,000 m of altitude
Factory Calibrated Range: 69 to 400 kPa, 0° to 40°C
Burst Pressure: 500 kPa or 40.8 m depth
Water Level Accuracy*: Typical error: ±0.05% FS, 1.5 cm water. Maximum error: ±0.1% FS, 3.0 cm water
Raw Pressure Accuracy**: ±0.3% FS, 1.20 kPa maximum error
Resolution: <0.04 kPa, 0.41 cm water
Pressure Response Time (90%)***: <1 second at a stable temperature

Pressure (Absolute) and Water Level Measurements MX2001-03-SS-S

Operation Range:  0 to 850 kPa; approximately 0 to 76.5 m of water depth at sea level, or 0 to 79.5 m of water at 3,000 m of altitude
Factory Calibrated Range: 69 to 850 kPa, 0° to 40°C
Burst Pressure: 1,200 kPa (174 psia) or 112 m depth
Water Level Accuracy*: Typical error: ±0.05% FS, 3.8 cm water. Maximum error: ±0.1% FS, 7.6 cm water
Raw Pressure Accuracy**: ±0.3% FS, 2.55 kPa maximum error
Resolution: <0.085 kPa, 0.87 cm water
Pressure Response Time (90%)***: <1 second at a stable temperature

Pressure (Absolute) and Water Level Measurements MX2001-04-SS-S and MX2001-04-Ti-S

Operation Range: 0 to 145 kPa; approximately 0 to 4 m of water depth at sea level, or 0 to 7 m of water at 3,000 m of altitude
Factory Calibrated Range: 69 to 145 kPa, 0° to 40°C
Burst Pressure: 310 kPa or 18 m depth
Water Level Accuracy*: Typical error: ±0.075% FS, 0.3 cm water. Maximum error: ±0.15% FS, 0.6 cm water
Raw Pressure Accuracy**:  ±0.3% FS, 0.43 kPa maximum error
Resolution: <0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water
Pressure Response Time (90%)***: <1 second at a stable temperature

Barometric Pressure (RXW-WL-xxx)

Operation Range: 66 to 107 kPa
Temperature Calibrated Range: -20 to 50°C
Accuracy: ±0.2 kPa over full temperature range at fixed pressure; maximum error ±0.5% FS.
Water Level Accuracy*: Typical error: ±0.075% FS, 0.3 cm water. Maximum error: ±0.15% FS, 0.6 cm water
Resolution: <0.01 kPa (0.0015 psi)
Response Time: <1 second at stable temperature
Stability (Drift): <0.01 kPa (0.0015 psi) per year

Temperature Measurements (All Sensor End Models MX2001-0x-SS-S and MX2001-0x-Ti-S)

Operation Range: -20° to 50°C
Accuracy: ±0.44°C from 0° to 50°C
Resolution: 0.1°C at 25°C
Response Time (90%): 5 minutes in water (typical)
Stability (Drift): 0.1°C  per year