Hobo MX Series Manual page 3

Specifications (continued)
Weight
Wetted Materials
Environmental Rating
* Water Level Accuracy: With accurate reference water level measurement, known water density,
and a stable temperature 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. There can be up to 0.5% of additional error due to rapid temperature
changes. Measurement accuracy also depends on temperature response time.
Logger Components and Operation
Top end
Sensor end
Temperature
sensor (inside)
Pressure sensors (inside)
Battery holders
Password reset
button
Disassembled top end
1-508-759-9500 (U.S. and International)
1-800-LOGGERS (U.S. only)
Top end (MX2001-TOP): Approximately 136 g (4.78 oz) in air
Stainless sensor end (MX2001-0x-SS-S): Approximately 141.4 g (4.99 oz) in air; approximately 93.4 g (3.3 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
Top end (MX2001-TOP): PVC housing, Polycarbonate end cap, Viton O-ring
Stainless sensor end (MX2001-0x-SS-S): Stainless steel housing, Viton and Buna-N O-rings, ceramic sensor in
stainless steel end cap
Titanium sensor end (MX2001-0x-Ti-S): Acetal housing, Viton and Buna-N O-rings, ceramic sensor in Titanium
end cap
Cable (CABLE-DR-XXX): Polycarbonate end cap, PVC end cap, nylon collar nut, Viton O-rings, polyurethane
jacket
Top end: NEMA 6, IP67
Sensor end: IP68
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
See last page
End cap with
mounting hole
Water level logger cable
LED (Not Visible)
HOBO MX Water Level Logger (MX2001-0x) Manual
The MX water level logger consists of a top end and a sensor
end that is connected by a water level logger cable. The three
components work together to allow for wireless transfer of
data to the app on a mobile phone or tablet. This is an overview
of each main component and the internal components in the
top end:
• Top end. This contains the Bluetooth wireless
communication and two AA batteries. This top end unit is
suspended from the top of the well using the mounting
hole in the end cap (see Deploying the Logger).
• Sensor end. This measures the pressure and temperature
in the water. The nose cone on the sensor end houses the
pressure sensors and the body of the sensor end houses
the temperature sensor.
• Water level logger cable. This is the cable that connects
the top end to the sensor end. Data measured by the
sensor is transmitted through the cable to the top end
where it is logged for later upload to a mobile phone or
tablet (see Configuring the Logger).
• Battery holders. Two AA batteries are installed in the
battery holders in the top end (see Battery Information).
• Password reset button. Press the button between the two
batteries in the top end to reset the logger password to
the factory default (see Setting a Logger Password).
• LED. Remove the end cap from the top end to view the
red LED below the top edge of the circuit board. This LED
blinks every second while logging and every 8 seconds
3
Plot A
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