Check the listing for details. Eberline E-530 GM Survey Meter. Condition: Used. Listed at 220.00 USD. The E-530 marked a big advance in the E-series meters. It has 5 ranges, from X.01 to X100. This latter is used only with a provided internal energy compensated GM tube and is scaled for 0-2000 mR/h. The unit has a simple layout with good quality components. Inside you find a Victoreen regulator tube, excellent quality switches, extra robust (thick) glass epoxy circuit boards which make the E-530 a real winner. Input sensitivity is set to 12 mV fixed, but each of the 5 ranges has it's own cal pot. For a quarter century old design, it is right there with the best of today's offerings. An extra folding clip on the closure hardware provides an attachment point for a carry strap, not evident in later models. These are typically set up to use with an energy compensated GM such as the Eberline HP-270. The E-530N is the same meter with "enhanced" ability to contend with moist conditions (basically a gasket on the cannister). Add a Counts.Pro to take this meter to the next level! This meter can be upgraded significantly to include recording of all readings and an alarm by adding a Counts.Pro. For $499 ($719 - which is less than a new Ludlum Model 3 for example) we can add a counts.pro to this meter and make it more effective than the most modern GM meters available today. See Ebay Item 401468071255 For more details on Counts.Pro or look it up online for a video description. For Internal Use:Barcodes: MultipleLocation: Eberline Rm CHP Consultants dba CHP Surplus est. 2002 chpconsultants.com We offer 30-day return policy on our inventory. If you are not satisfied with an item, please contact us so we can work out a solution to your satisfaction. Due to the variety of the items, we sell through our store, we are only able to thoroughly test our items labeled as “Radiation Detectors”. We are happy to answer further questions on any item if we can. Please do not hesitate to message us if more information is needed. We are easy to reach during regular business hours. Monday through Friday 9-3.We take pain staking efforts to pack all items quickly and properly for safe shipping.We can consolidate shipping. If you place more than one order and wish to consolidate, simply message us prior to shipping and we can reduce shipping costs. Local pick up is available Oak Ridge, TN.We stand behind our eBay store. Check out CHPSurplus here for various miscellaneous equipment at a low price.