Pendant design for easy use in in the field

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 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. For accurate temperature measurement in sunlight a solar radiation shield is required (RS1 Solar Radiation Shield, assembly required; M-RSA pre-assembled Solar Radiation Shield).

Features

• 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

For a self-contained rainfall logger, see the HOBO RG3 which includes a data logger integrated into a tipping-bucket rain gauge.

 

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; see Data Storage.
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 all relevant directives in the European Union (EU).

HOBOware Software

HOBOware software is used for launching, reading out, and plotting data from HOBO® data loggers. With HOBOware, you can also check logger status, filter and export data, save changes to graphs in project files, and scale data with the Linear Scaling and Pulse Scaling data assistants. There are two versions of HOBOware: HOBOware and HOBOware Pro.

Learn more about HOBOware and HOBOware-Pro Features >>