HOBO Bluetooth Low Energy Water Level Data Logger (MX2001-02-S)


Highlighted Features

  • Wireless data offload to mobile devices using Bluetooth Low Energy
  • Integrated barometric pressure sensor enables direct water level readout
  • Direct read cable connects sensor to top-end logger/transmitter
    • The cable includes Kevlar strength member
    • Cables are interchangeable so loggers are easy to redeploy in future applications
    • The logger and sensor add 0.39 meters to the length of the cable
    • Cable length can vary up to 3% from the length ordered
    • The 1, 5, 10, 15, 30 and 60 meter cable lengths are in stock; custom cable lengths have a 1 to 2 week lead time
  • Reference water level can be entered at the start of the deployment
  • Use HOBOmobile for setup, data viewing and data sharing
  • Powered by two user-replaceable AA batteries in the top-end unit
  • Several logging modes: normal, multi-rate logging and event-triggered burst-logging
  • Durable ceramic sensor
  • Available with stainless steel or titanium sensor ends
  • 3-point NIST-traceable calibration certificate included for the water pressure sensor


Pressure (Absolute) and Water Level Measurements MX2001-02-S  –  30 Meter (100′) range​
Operation Range0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) of water depth at sea level, or 0 to 33.6 m (0 to 111 ft) of water at
3,000 m (10,000 ft) of altitude
Factory Calibrated Range69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
Burst Pressure500 kPa (72.5 psia) or 40.8 m (134 ft) depth
Water Level Accuracy*Typical error: ±0.05% FS, 1.5 cm (0.05 ft) water
Maximum error: ±0.1% FS, 3.0 cm (0.1 ft) water
Raw Pressure Accuracy**±0.3% FS, 1.20 kPa (0.17 psi) maximum error
Resolution0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water
Pressure Response Time (90%)***1 second at a stable temperature
Operation Range-20° to 50°C (-4° to 122°F)
Radio Power1 mW (0 dBm)
Transmission RangeApproximately 30.5 m (100 ft) line-of-sight
Wireless Data StandardBluetooth Low Energy (Bluetooth Smart)
Logging Rate1 second to 18 hours
Logging ModesFixed interval, multiple intervals with up to 8 user-defined logging intervals and durations, or event-triggered burst
Memory ModesWrap when full or stop when full
Start ModesImmediate, date & time, or next interval
Stop ModesWhen memory full, stop with HOBOmobile, date & time, or after a set logging period
Time Accuracy±1 minute per month 0° to 50°C (32° to 122°F)
BatteryTwo AA, 1.5 V alkaline batteries, user replaceable
Battery Life1 year, typical with logging interval of 1 minute. Faster logging and/or statistics sampling intervals, entering burst logging mode, excessive readouts, checking of Full Status Details, and remaining connected with HOBOmobile will impact battery life.
Memory256 KB memory (30,000 sets of measurements)
Full Memory Download TimeApproximately 2 minutes; may take longer the further the device is from the top end of the logger
DimensionsTop end (MX2001-TOP): 2.54 cm (1.0 inches) diameter, 28.9 cm (11.4 inches) length; mounting hole 7.6 mm (0.3 inches) diameter

Sensor end (MX2001-0x-S and MX2001-0x-Ti-S: 2.54 cm (1.0 inches) diameter, 9.91 cm (3.9 inches) length

Note: The length of the water level logger cable (CABLE-DR-xxx) can vary -0% to +3% +10 cm (3.9 inches) from the length ordered. The logger adds 38.8 cm (15.3 inches) to the length of the cable ordered.

WeightTop end (MX2001-TOP): Approximately 136 g (4.78 oz) in air

Stainless sensor end (MX2001-0x-S): Approximately 106 g (3.74 oz) in air; approximately 53.9 g (1.9 oz) in fresh water

Titanium sensor end (MX2001-0x-Ti-S): Approximately 80 g (2.83 oz) in air; approximately 37 g (1.3 oz) in fresh water

Wetted MaterialsTop end (MX2001-TOP): Acetal housing, Polycarbonate end caps, Polycarbonate collar nut; Viton and Buna-N O-rings

Stainless sensor end (MX2001-0x-S): Acetal housing, PVC end cap, Polycarbonate collar nut; Viton and Buna-N O-rings; ceramic sensor in stainless steel end cap

Titanium sensor end (MX2001-0x-Ti-S): Acetal housing, PVC end cap, Polycarbonate collar nut; Viton and Buna-N O-rings; ceramic sensor in Titanium end cap

Environmental RatingTop end: NEMA 6, IP67
Sensor end: IP68


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