Check the listing for details. Heidenhain MT 1271 H3 Microscope Focus Linear Encoder 12mm Straight Length Gauge. Condition: Used. Listed at 675.00 USD. This Heidenhain MT 1271 H3 Microscope Focus Linear Encoder is a high-quality accessory that ensures accurate and reliable microscopic measurements. Made in Germany, this encoder is designed for use in microbiological and biological laboratories, and is compatible with a variety of microscope models. Its straight length gauge and 12mm size make it a versatile tool for measuring focus and encouraging precision in your experiments. Whether you're a medical professional or a researcher, this encoder is a valuable addition to your laboratory equipment. Pulled from working microscope, 30 day returns within US. Heidenhain 331666-01 (MT 1271) 12mm Straight Length Gauge, plunger actuation by spring force, 0.2um Accuracy, and TTL Output Travel (12mm) Plunger actuation (extended by spring force) Reference mark (1.7mm) Accuracy (0.2um) Output (TTL w/5-fold interpolation) Power supply (5 -10%) Protection (IP50) Cable length (1.5m)