LDX System Promotion is now available. From August 1, 2018 until September 30, 2018 take advantage of a no-cost Cholestech LDX replacement certificate for a non-functioning Cholestech LDX or LDX Printer when you make the qualifying test cassette purchase. This promo runs until September 30, 2018. LDX System Promotion. Contact your local Stat Technologies sales representative for more details or to place an order.