HOBO Pendant Event Logger

Required Software and Components

>> HOBOWare Software Kit
>> Optic Base Station or Waterproof Data Shuttle

Pendant Event Logger Features

  • Measure and Log Temperature and Events Like a Tipping Bucket
  • Measurement Rate up to 1 Hz (1 pulse per second)
  • Mechanical and Electrical Contact Closures
  • Requires HOBOware Software and Optic Base Stations or Waterproof Shuttle

Pendant Event Logger Specifications

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
Lockout eliminates false readings from tipping-bucket bounce
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 Volts
Maximum Input Voltage Battery Voltage + 0.3 Volts
User Connection 24 AWG, 2 leads: White (+), Black (-)
Temperature Sensor
Measurement Range -20°C to 70°C (-4°F to 158°F)
Accuracy ±0.47°C at 25°C (±0.85°F at 77°F)
A solar radiation shield is required for accurate temperature measurements in sunlight
Resolution 0.10°C at 25°C (0.18°F at 77°F)
Drift Less than 0.1°C/year (0.2°F/year)
Response Time Airflow (2 m/s): 10 minutes, typical to 90%
Time Accuracy ± 1 minute per month at 25°C (77°F)
Operating Range -20°C to 70°C (-4°F to 158°F)
Drop Specification 1.5 m (5 ft) onto concrete
Battery User Replaceable CR-2032 3V Lithium Battery
Battery Life 1 Year with Typical Use
Data Storage Capacity Logger has 64,000 bytes of nonvolatile data storage. Data storage requirements per event are a function of enabled channels and logging interval. When events are three to 12 days apart, 32 bits are required to record a single event (16,000 events). When events are less than 16 seconds apart, only 22 bits are required to record a single event (23,000 events). In most cases, 25,000 to 30,000 data points (including events, temperature, and/or battery measurements) can be logged. For most rain bucket applications, battery life, not memory capacity, will be the factor that limits deployment duration.
Standards Compliance CE, NEMA 6, IP67
Weight 50 g (1.7 oz.)
Dimensions 71mm x 33mm x 23mm (2.8" x 1.3" x 0.9"); 1.8 m (6 ft) cable


Description Part Number
HOBO Pendant Event Logger UA-003-64
Required Software Kits - 1 Required (Compare HOBOWare Versions)
HOBOware Lite Software Kit for Windows/Mac (includes Software and Cable) BHW-LITE-CD
HOBOware Pro Software Kit for Windows/Mac (includes Software and Cable) BHW-PRO-CD
Communication Kits - 1 Required
Optic USB Base Station (includes Coupler) BASE-U-4
Pendant Optic Base Station with Coupler BASE-U-1
Waterproof Shuttle Data Transporter/Optic Base Station w/ Couplers - Requires HOBOWare Pro Software U-DTW-1
Optional Accessories
Extra/Replacement Batteries (pack of 5) - CR2032 Lithium Batteries HRB-TEMP-5
Custom USB Interface Cable CABLE-USBMB-HS

Optic USB Base Station

  • Offload and Relaunch Loggers in the Field
  • Optical Infrared Interface
  • Easy USB connection to PC
  • Includes All Couplers and USB Cable

Pendant Optic Base Station and Coupler

  • Offloads and Relaunches Pendant Data Loggers in the Field
  • Optical Infrared Interface
  • Easy USB connection to PC
  • Includes Coupler and USB Cable

Waterproof Shuttle Data Transporter

  • Waterproof to 20 meters (66ft)
Can be used as an Optic USB based station for HOBO Pendant loggers, HOBO Water Level Loggers, and HOBO Water Temp Pro V2 Loggers
  • Allows for data readout under water while diving or snorkeling
    solution team
  • Rugged waterproof construction
  • LEDs show offload and relaunch status

Application Notes (pdf)

Understanding the Differences Between State, Event and Pulse Datalogging