Hobo Pendant Event Logger

• 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
• Can be integrated into our rain gauges

The HOBO Pendant Event data logger is ideal for rainfall logging and connects to most standard tipping-bucket rain gauges to determine rainfall rates, times, and duration. The event data is only stored when it happens for better memory usage.

External event input
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.
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 (-4° to 158°F)
Accuracy	± 0.53°C from 0° to 50°C
Resolution	0.14°C at 25°C (0.25°F at 77°F), see Plot A
Drift	Less than 0.1°C/year (0.2°F/year)
Response time	Airflow of 2 m/s (4.4 mph), 10 minutes, typical to 90%
Logger
Time accuracy	± 1 minute per month at 25°C (77°F), see Plot B
Operating range	-20° to 70°C (-4° to 158°F)
Environmental rating	Tested to NEMA 6 and IP67; suitable for deployment outdoors
Drop specification	1.5 m (5 ft) onto concrete
NIST traceable certification	Available for temperature only at additional charge; temperature range -20° to 70°C (-4° to 158°F)
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 (1.7 oz.)
Dimensions	71 x 33 x 23 mm (2.8 x 1.3 x 0.9 inches); 1.8 m (6 ft) cable

Brochures
Hobo Pendant Event Logger

Manual
Hobo Pendant Event Logger Manual