CEM DT-3891F 2-Channel Thermocouple Thermometer

The CEM DT-3891F 2-Channel Thermocouple Thermometer with Data Logger is a professional instrument designed for high-accuracy temperature measurement, differential temperature analysis, and long-term data recording. Supporting two thermocouple inputs, it measures temperatures from two separate points simultaneously while also calculating the temperature difference (T1–T2), making it an ideal solution for laboratory testing, electronics development, HVAC diagnostics, industrial maintenance, research, and process monitoring. Combining the functionality of a precision thermocouple thermometer with an integrated data logger, the DT-3891F enables users to monitor, document, and analyse temperature data with confidence.

Designed for demanding professional environments, the DT-3891F features high-speed sampling, laboratory-grade measurement accuracy, and a large internal memory capable of storing up to 18,000 readings per channel. Recorded data can be transferred to a computer via USB for reporting, analysis, and long-term documentation, making the instrument suitable for quality assurance, validation, troubleshooting, and compliance applications. Additional functions including MAX/MIN/AVG recording, Data Hold, electronic offset compensation, a backlit LCD display, and automatic power-off improve efficiency during field and laboratory work. Whether monitoring industrial equipment, validating HVAC performance, testing electronic components, or recording critical process temperatures, the CEM DT-3891F delivers reliable thermocouple temperature measurement together with comprehensive data logging in one compact professional instrument.

Features

• Dual-Channel Temperature Measurement: Measures temperature from two independent channels (CH1 & CH2) simultaneously for easy comparison.
• Wide Measurement Range: Supports K-type thermocouples (-200°C to +1372°C) and J-type thermocouples (-210°C to +1100°C).
• High Accuracy & Resolution: Provides up to ±1°C accuracy with 0.1°C resolution for precise measurements.
• Large Data Logging Capacity: Stores up to 18,000 records per channel for long-term temperature monitoring.
• Backlit LCD Display: Large illuminated screen clearly shows temperature values, even in low-light environments.
• MAX / MIN / AVG Functions: Displays maximum, minimum, and average temperature values for detailed analysis.
• Electronic Offset Compensation: Reduces probe-related measurement errors for improved accuracy.
• Multiple Temperature Units: Supports °C, °F, and Kelvin (K) measurement units.
• Auto Power-Off Function: Saves battery life by automatically turning off when not in use.
• Portable and Efficient Design: Powered by 3 × AAA batteries, suitable for laboratory, industrial, and field applications.

Technical Specifications