The Extech SD500 is a dual-display datalogger that simultaneously measures and records relative humidity (10 to 90% RH) and temperature (32 to 122°F / 0 to 50°C). Designed for environmental monitoring in calibration rooms, offices, cleanrooms, and storage facilities, it logs timestamped data directly to a 2 GB SD card in Excel®-compatible CSV format for easy transfer and analysis on a PC. With a user-selectable sampling interval from 5 seconds to 10 minutes (plus Auto mode), a large dual LCD, and long-life battery operation, the SD500 supports both portable and AC-powered use. It includes 6 AAA batteries, a universal AC adapter, 2 GB SD card, and mounting bracket.
- Dual LCD displays real-time humidity and temperature readings
- Logs data to 2 GB SD card in Excel®-compatible format
- User-selectable sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds or Auto
- Large memory capacity: up to 20 million data points
- Powered by 6 AAA batteries or universal AC adapter
- Includes mounting bracket for wall or desktop installation
- Ideal for calibration labs, cleanrooms, offices, and storage monitoring