The VEECO MS-17 Helium Leak Detector is a full size unit. It has a liquid nitrogen cold trap. Maximum rated sensitivity 6 X 10-11 atm cc/sec for air. Response time is less than 1.5 seconds. Solid state electronics, analog display. A digital display version of this model is available. It is a VEECO MS-170 wich also has a gross leak capability. The size of the unit is 36 X 22 X 28 (H x W x D) and the weight is 400 lbs.