Lutron BTM-4208SD 12-Channel Digital Thermometer with SD Card Data Logger – J, K, T, E, R & S Thermocouple

General
The Lutron BTM-4208SD is a 12-channel digital thermometer and temperature data logger designed for monitoring and recording temperatures from multiple points simultaneously. It supports Type K, J, T, E, R and S thermocouple probes, making it suitable for industrial temperature monitoring, testing, maintenance and process applications.

Its built-in SD card data logging function records temperature readings with date and time information in CSV format, allowing recorded data to be transferred to a computer and analysed using Microsoft Excel without requiring additional software. The instrument supports automatic and manual recording, selectable sampling intervals and a large backlit LCD display.

Features
- 12-channel temperature measurement and recording
- Compatible with Type K, J, T, E, R and S thermocouples
- Real-time SD card data logging
- Automatic and manual data recording modes
- Adjustable sampling interval from 1 to 3600 seconds
- Saves readings with date and time information
- CSV data format for Excel analysis
- Displays channels 1–8 or 9–12
- Large LCD with green backlight
- Temperature display in °C or °F
- Data hold and maximum/minimum recording functions
- RS-232 and USB computer interfaces
- Battery or external adapter power options

Key Specifications
- Brand: Lutron
- Model: BTM-4208SD
- Product Type: 12-Channel Digital Thermometer / Temperature Data Logger
- Number of Channels: 12
- Compatible Thermocouples: Type K, J, T, E, R and S
- Temperature Measuring Range: Depends on thermocouple type; Type K: -100 to 1300 °C; Type J: -100 to 1200 °C
- Display Resolution: 0.1 °C / 1 °C; 0.1 °F / 1 °F
- Data Logging: Automatic and manual
- Sampling Interval: 1 to 3600 seconds
- Storage Media: SD memory card, 1 GB to 16 GB supported
- Data Format: CSV
- Time Recording: Year, month, date, hour, minute and second
- Display: 82 × 61 mm LCD with green backlight
- Computer Interface: RS-232 / USB
- Power Supply: 8 × 1.5 V AA batteries or optional 9 V DC adapter
- Dimensions: 225 × 125 × 64 mm
- Weight: Approximately 948 g