SL51T - Lowest cost, -40°C to +85°C measuring with ±1.0°C Accuracy
SL51T-A - Identical to the SL51T but supplied with three point calibration certificate
SL52T - Larger memory and faster sample rates. ±0.5°C Accuracy
SL52T-A - Identical to the SL52T but supplied with three point calibration certificate
SL53T - High temperature 0°C to +125°C
SL53T-A - Improved accuracy SL53T (±0.2°C from +80°C to +125°C) supplied with calibration certificate
SL54TH - Temperature & relative humidity
SL54TH-A - Improved relative humidity accuracy
SL55T - Highest temperature +15°C to +140°C
SL55T-A - Improved accuracy of ±0.5°C from +80°C to +140°C. Supplied with calibration certificate