... . 3. Bright LCD display, can display all of the patements, e. G. Temperature, pressure and gas flow. 4. Use ... one of the top grade standard chromatograph. Index of temperature controller 1. GC1690 is using big capacity column oven, and ... column oven: 14600cm3, precision of temperature: ± 0.1degree. Five steps temperature control program, temperature gradient: ± 1%, temperature control program rate: 0.1 ...