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RXW-WL-868 HOBOnet Water Level Sensor Interface
  • RXW-WL-868 HOBOnet Water Level Sensor Interface
  • RXW-WL-868 HOBOnet Water Level Sensor Interface
  • RXW-WL-868 HOBOnet Water Level Sensor Interface
  • RXW-WL-868 HOBOnet Water Level Sensor Interface

RXW-WL-868 HOBOnet Water Level Sensor Interface

RXW-WL-868

RXW-WL-868 HOBOnet Water Level Sensor Interface

A wireless sensor interface that works with the HOBOnet system for remote water level monitoring.

The HOBOnet water level sensor interface features a pre-configured, easily deployed wireless sensor that communicates accurate, reliable water level data directly to a HOBO RX3000 or HOBO MicroRX station, the core component of the HOBOnet remote monitoring system.
Important Information

A complete system requires at least one HOBOnet Water Level Sensor, a direct read cable, and a HOBO RX3000 Remote Monitoring Station and HOBOnet Wireless Manager (or a HOBO MicroRX Station with  an integrated HOBOnet Wireless Manager). HOBOnet Wireless Repeaters (RXW-RPTR-xxx or RXW-RPTR-B-xxx) can be added to extend the range.

Quantity

Description

Overview
The HOBOnet water level sensor interface features a pre-configured, easily deployed wireless sensor that communicates accurate, reliable water level data directly to a HOBO RX3000 or HOBO MicroRX station, the core component of the HOBOnet remote monitoring system.

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 (1,500 to 2,000 feet) 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 (-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 line-of-sight connection of 457.2 m (1500 ft) at a height of 1.8 m (6 ft)
Reliable line-of-sight connection of 609.6 m (2000 ft) at a height of 3 m (10 ft)
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 used
OQPSK (quadrature phase shift keying with offset)
Data rate
Up to 250 kbps, not adjustable
Duty cycle
<1%
Maximum number of motes
Up to 50 wireless sensors or 336 data channels per HOBO RX station
Recording rate
1 minute to 18 hours
Number of data channels
4 (water level, differential pressure, water temperature, barometric pressure)
Battery type/power source
Two 1.2 V AA NiMH rechargeable batteries, powered by built-in solar panel or two 1.5 V AA non-rechargeable lithium batteries for operating conditions of -40 to 70 °C (-40 to 158 °F) °F)
Battery Life
With NiMH batteries: typically 3 to 5 years when operated in the temperature range of -20°C to 40°C (-4°F to 104°F) and positioned towards the sun, operation outside this range will reduce battery life.
With non-rechargeable lithium batteries: 1 year, typical use
Memory
16 MB
Dimensions
Interface connector diameter: 25.4 mm (1 in)
Cable length: 1.83 m (6 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 in)
Weight
229 g (8.08 oz)
Materials
Sensor: Polycarbonate housing enclosing an epoxy-sealed circuit board
Cable: Polyurethane
Mote: PCPBT, silicone rubber seal
Environmental rating
Mote: IP67, NEMA 6
Image
US FCC mark
RXW-WL-900
Image
CE conformity mark
RXW-WL-868
Image
US conformity mark Taiwan
RXW-WL-921
Image
Australia and New Zealand Regulatory Compliance Mark (RCM)
RXW-WL-922

Water Level Sensor
See reference below
* Water Level Accuracy: With accurate reference water level measurement, known water density and stable temperature environment. The system water level accuracy is equal to 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 errors induced by sensor drift, temperature and hysteresis.
*** Temperature Changes: Allow 20 minutes to stand in water to achieve full temperature compensation of the pressure sensor. There may be up to 0.5% additional error due to rapid temperature changes. Measurement accuracy is also dependent on temperature response time.

Pressure (absolute) and water level measurements MX2001-01-SS-S and MX2001-01-Ti-S
Operating range
0 to 207 kPa (0 to 30 psia); Approximately 0 to 9 m (0 to 30 ft) water depth at sea level, or 0 to 12 m (0 to 40 ft) water at 3000 m (10,000 ft) altitude
Factory calibrated range
69 to 207 kPa (10 to 30 psia), 0° to 40° C (32° to 104° F)
Burst pressure
310 kPa (45 psia) or 18 m (60 ft) depth
Water level accuracy*
Typical error: ±0.05% of full scale, 0.5 cm (0.015 ft) of water
Maximum error: ±0.1% of full scale, 1.0 cm (0.03 ft) of water
Raw pressure accuracy**
±0.3% of full scale, maximum error of 0.001% 0.62 kPa (0.09 psi)
Resolution
<0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) of water
Pressure Response Time (90%)***
<1 second at stable temperature
Pressure (absolute) and water level measurements MX2001-02-SS-S

Operating Range
0 to 400 kPa (0 to 58 psia); Approximately 0 to 30.6 m (0 to 100 ft) water depth at sea level, or 0 to 33.6 m (0 to 111 ft) water at 3000 m (10,000 ft) altitude
Factory calibrated range
69 to 400 kPa (10 to 58 psia), 0 to 40 °C (32 to 104 °F)
Burst pressure
500 kPa (72.5 psia) or 40.8 m (134 ft) depth
Water level accuracy*
Typical error: ±0.05% of full scale, 1.5 cm (0.05 ft) of water
Maximum error: ±0.1% of full scale, 3.0 cm (0.1 ft) of water
Raw pressure accuracy**
±0.3% of full scale Full, 1.20 kPa (0.17 psi) Maximum Error
Resolution
<0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) of water
Pressure Response Time (90%)***
<1 second at stable temperature

Pressure (Absolute) and Water Level Measurements MX2001-03-SS-S
Operating Range
0 to 850 kPa (0 to 123.3 psia); Approximately 0 to 76.5 m (0 to 251 ft) water depth at sea level, or 0 to 79.5 m (0 to 262 ft) water at 3000 m (10,000 ft) altitude
Factory calibrated range
69 to 850 kPa (10 to 123.3 psia), 0 to 40 °C (32 to 104 °F)
Burst pressure
1200 kPa (174 psia) or 112 m (368 ft) depth
Water level accuracy*
Typical error: ±0.05% of full scale, 3.8 cm (0.125 ft) of water
Maximum error: ±0.1% of full scale, 7.6 cm (0.25 ft) of water
Raw pressure accuracy**
±0.3 % of full scale, 2.55 kPa (0.37 psi) maximum error
Resolution
<0.085 kPa (0.012 psi), 0.87 cm (0.028 ft) of water
Pressure response time (90%)***
<1 second at stable temperature

Pressure (absolute) and water level measurements MX2001-04-SS-S and MX2001-04-Ti-S

Operating range
0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) water depth at sea level, or 0 to 7 m (0 to 23 ft) water at 3000 m (10,000 ft) altitude
Factory calibrated range
69 to 145 kPa (10 to 21 psia), 0° to 40 °C (32° to 104 °F)
Burst pressure
310 kPa (45 psia) or 18 m (60 ft) depth
Water level accuracy*
Typical error: ±0.075% of full scale, 0.3 cm (0.01 ft) of water
Maximum error: ±0.15% of full scale, 0.6 cm (0.02 ft) of water
Raw pressure accuracy**
±0.3% of full scale, maximum error 0.43 kPa (0.063 psi)
Resolution
<0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) of water
Pressure Response Time (90%)***
<1 second at stable temperature
Barometric Pressure (RXW-WL-xxx)

Operating Range
66 to 107 kPa (9.57 to 15.52 psia)
Calibrated Temperature Range
-20 to 50 °C (-4 to 122 °F)
Accuracy
±0.2 kPa (±0.029 psi) over entire temperature range at fixed pressure; Maximum Error ±0.5% FS
Water Level Accuracy*
Typical Error: ±0.075% FS, 0.3 cm (0.01 ft) of water
Maximum Error: ±0.15% FS, 0.6 cm (0.02 ft) of 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 MX2001-0x-SS-S and MX2001-0x-Ti-S Sensor End Models)
Operating Range
-20° to 50° C (-4° to 122° F)
Accuracy
±0.44° C from 0° to 50° C (±0.79° F) °F (32° to 122°F)
Resolution
0.1°C to 25°C (0.18°F to 77°F)
Response Time (90%)
5 minutes in water (typical)
Stability (drift)
0.1°C (0.18°F) per year

Product Details
RXW-WL-868
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