Pendant Event and Temperature Data Logger
- 2-Wire Interface Senor Suitable for Measuring Mechanical and Electrical Contact Closures
- Up to 1HZ (1 pulse per Second) Measurement Rate for Events
- -20°C to 70°C Temperature Measurement Range
- 1 Year User-Replaceable Coin Cell Lithium Battery
- Waterproof Housing for Use in Outdoor or Condensing Environments Up to 30 Meters (100 ft)
Requires Optic USB Base Station (BASE-U-4) and HOBOware (Free Download Version) or HOBOware Pro (Paid Download Version) Software.
Overview of the HOBO UA-003-64 Event Counter Data Logger
The Onset HOBO UA-003-64 Pendant is a data logger that records temperature and events using an external contact closure input. Combine this logger with a tipping rain bucket gauge to accurately measure rainfall rates, times, and duration. The UA-003-64 can be used with any sensor or gauge utilizing a scaled contact closure output. The logger will only store data in memory if there is an event which maximizes available memory. Downloading the logger can be done in less than 30 seconds using the required optical USB interface (BASE-U-4 or U-DTW-1). The logger is configured, and data is viewed using either free HOBOware or HOBOware Pro (paid) software.
Onset HOBO® UA-003-64 Pendant Event Data 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. |
Software Compatibility | HOBOware and HOBOware PRO Version 3.5+ |
OS Compatibility | Windows: Windows 11, 10 and 7 (32 and 64-Bit) Mac: OS X 10.9.x, 10.10.x and 10.11.x |
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 |