Optics Technology offers 220/400 mm Polarimeter. Optics Technology is an ISO 9001:2000 certified company. The 220/400 mm Polarimeter includes maximum length of tubes. The smaller tubes of course can also be used. The tubes supplied have a bubble trap. Polaroid Sheets are used for polarizing the incident light and the glass circular scale are finely marked in angular degrees and also in ISS degrees. The range on ISS Scale is from -30 degree to + 130 degree C.