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HOBO Pendant Event Data Logger

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Overview

Specifications

Accurately measure rainfall with the HOBO Pendant® Event Data Logger. Determine rainfall rates, times, and duration after deployment with most standard tipping-bucket rain gauges. Efficiently gather and store momentary contact events and temperature data. Additionally, gain access to detailed event data. Event data is only stored when it happens for better memory usage. Use a solar radiation shield for accurate temperature measurement in sunlight applications. See RS1 Solar Radiation Shield (assembly required) and M-RSA (pre-assembled) Solar Radiation Shield.

Manufactured by: Onset

Model: HOBO Pendant Event Data Logger

Services offered for this product

Sales
Rental
Installation
Calibration
Maintenance

Applications

Event
Rainfall
Temperature

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. 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 (-4° to 158°F)
Accuracy	± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), see Plot A. A solar radiation shield is required for accurate temperature measurements in sunlight.
Resolution	0.14°C at 25°C (0.25°F at 77°F), see Plot A in manual
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 in manual
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
The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).

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