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HOBO Event Data Logger

The HOBO Pendant Event Logger is ideal for rainfall logging and connects to most standard tipping-bucket rain gauges to determine rainfall rates, times, and duration. The HOBO Pendant Event records momentary contact events and temperature. Event data is only stored when it happens, which results in efficient memory usage while still providing detailed event data.

HOBO Event Data Logger UA-003-64

• Ideal for recording rainfall with tipping-bucket rain gauges
• Records tips or momentary contact closures and temperature
• Event-based data storage provides detailed data and efficient memory usage
• Stores over 16,000 tips (160 in. of rainfall with a 0.01 in. rain gauge)
• Includes scaling to inches, millimeters or other units

The HOBO Pendant Event/Temp Data Logger is a rugged, weatherproof event logger with a 10-bit temperature sensor. It is ideal for use with tipping-bucket rain gauges, and can record tens of thousands of measurements and events. The logger uses a coupler and optical base station with USB interface for launching and data readout by a computer.

A base station, coupler, and HOBOware® software are required for logger operation.

Event sensor: Two-wire interface suitable for measuring mechanical and electrical contact closures
Maximum input frequency: 1 Hz (1 pulse per second)
Lockout time: 500 ms
Minimum pulse width: 1 ms (hardware debounce)
Input/output impedance: 100 kΩ

Edge detection: Falling edge, contact closure, or Schmitt-trigger buffer
Preferred switch type: Normally open. For maximum battery life, the event input should be used with its preferred switch type. The logger will work with normally closed switches, but battery life will be compromised.

Open circuit input voltage: Battery voltage; nominally 3.0 V
Maximum input voltage: Battery voltage + 0.3 V
User connection: 24 AWG, 2 leads: white (+), black (-)

Temperature measurement
Measurement range: -20° to 70°C
Accuracy: ± 0.47°C at 25°C. A solar radiation shield is required for accurate temperature measurements in sunlight.
Resolution: 0.10°C at 25°C
Drift: Less than 0.1°C/year
Response time: Airflow of 2 m/s: 10 minutes, typical to 90%

Time accuracy: ± 1 minute per month at 25°C
Operating range: -20° to 70°C
Environmental rating: Tested to NEMA 6 and IP67; suitable for deployment outdoors
Drop specification: 1.5 m onto concrete

Battery: CR-2032 3V lithium battery; 1 year typical use
Memory: 64K bytes
Materials: Polypropylene case; stainless steel screws; Buna-N o-ring; PVC cable insulation
Weight: 50 g
Dimensions: 71 x 33 x 23 mm; 1.8 m cable

The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).

Ordering Information:
UA-003-64 - HOBO Event Data Logger
BHW-PC - HOBOware Pro Software Kit for Windows (includes Software and Cable)
FS-89478 - Base Station for HOBO Pendant Loggers