Dual-Range Temperature Thermostat LDRT-E13 - Laboratory Temperature Thermostat Labtron Dual Range Temperature Thermostat offers 20 L capacity with a −40 ℃ to 200 ℃ range and ± 0.05 ℃ fluctuation. It includes a 13 L/min circulating pump with energy-efficient high-speed cooling. Transparent lid, over-temperature protection, and power recovery aid stable use.