For derectors Sapphire, Opal LED, LCD 2083.2 and LCD 2084.2
For detectors: LCD 2070 , LCD 2071.2, LCD 2071.3, LCD 2073A, OPAL, TOPAZ and FLASH 06.
For detectors Flash 06, Flash 10, LCD 2070, LCD 2071.2, Opal, TOPAZ Dual UV and LCD 2073.
External, connected by fiber optics.
Prevents from releasing gas bubbles in cell