Extech SDL200 4-Channel Datalogging Thermometer

The Extech SDL200 4-Channel Datalogging Thermometer gives you a simple way to measure and record temperatures from several points at the same time. It accepts four thermocouple inputs and also supports two Pt100 RTD channels for added flexibility. Data is stored directly to an SD card, making long-term monitoring easy and reliable.

Built for industrial and laboratory work, this instrument displays readings from T1 to T4 or shows a differential T1-T2 measurement. Users can select a logging interval from one second to one hour to suit the application. In addition, the real-time clock adds date and time information to every stored reading.

Flexible Multi-Channel Monitoring

The Extech SDL200 4-Channel Datalogging Thermometer works with six thermocouple types, including J, K, E, T, R and S. This broad compatibility lets users handle a wide range of temperature measurement applications with a single instrument. It also includes an offset adjustment function that creates a relative zero point for more accurate comparisons between readings.

The logger saves recorded data in CSV format, allowing users to transfer files easily into spreadsheet software for analysis. A built-in USB interface provides a quick and simple way to connect the instrument to a computer. In addition, the SDL200 stores up to 99 readings in its internal memory or up to 20 million readings when used with the supplied 2GB SD card.

Designed for Field Use

Its rugged construction makes the Extech SDL200 4-Channel Datalogging Thermometer suitable for HVAC engineers, maintenance teams and quality control departments. Min and Max functions help users review temperature changes, while the data hold feature freezes readings for easier recording. Automatic power-off also helps to extend battery life during long working days.

Two different set types are available for the SDL200 range, allowing users to choose the most suitable probe configuration for their application. Each unit is supplied ready for immediate use with batteries, probes and a protective carrying case. This combination of flexibility and high data capacity makes it a practical tool for professional temperature logging.

Key Features

Measures up to four temperature channels simultaneously
Accepts J, K, E, T, R and S thermocouple probes
Supports two Pt100 RTD input channels
Stores readings directly to an SD memory card
Records up to 20 million measurements on a 2GB card
Provides T1, T2, T3 and T4 temperature display modes
Offers differential T1 minus T2 measurements
Features adjustable sampling intervals from 1 to 3600 seconds
Includes real-time date and time stamping
Provides relative zero offset adjustment
Features Min and Max recording functions
Includes Data Hold function for viewing readings
Built-in USB interface for PC connection
Supplied with a hard carrying case
Available in two different set configurations

Technical Specifications

Manufacturer	Extech
Manufacturer part code	SDL200
Instrument type	4-channel datalogging thermometer
Thermocouple types	J, K, E, T, R and S
RTD compatibility	Pt100 with two channels
Type J range	-100°C to 1150°C
Type K range	-100°C to 1300°C
Type T range	-50°C to 400°C
Type E range	-50°C to 900°C
Type R range	0°C to 1700°C
Type S range	0°C to 1500°C
Pt100 range	-200°C to 850°C
Resolution	0.1°C / 0.1°F
Basic accuracy	±0.4% reading ±1°C for J, K, E, T and Pt100
Basic accuracy for R and S	±0.5% reading ±1°C
Sampling rate	User programmable from 1 to 3600 seconds
Internal memory	99 readings
SD card capacity	20 million readings using 2GB SD card
Data format	CSV compatible with spreadsheet software
Display	LCD display showing T1 to T4 or T1-T2 differential
Interface	Built-in USB port
Power supply	6 x AA batteries
Dimensions	182 x 73 x 47.5mm
Weight	500g
Included probes	Four Type K bead wire probes
Warranty	Not specified

Document Downloads

Extech SDL200 4 Channel Datalogging Thermometer - Datasheet (Size: 175 KB)

What’s Included