Check the listing for details. Fieldpiece SDMN6 Pressure Switch Tester. Condition: New. Listed at 458.43 USD. Brand New Fieldpiece SDMN6 Pressure Switch Tester Manufacturer model: SDMN6 Measures gas pressure, static pressure and differentialUse to test and adjust pressure switchesFeatures include a backlit dual display, zero adjust button, rugged rubber boot, magnetic hanger and auto power offIncludes: 2 static pressure probes, 2 slide on gas adapters, quick connect leads, 3 hoses and Y-splitter and pump bleed accessory Description The SDMN6 dual-port manometer measures gas and static pressure and also accurately tests pressure switches by simulating a draft with an internal pump. A pressure switch is a safety device that prevents the furnace from running in an unsafe manner. The SDMN6 tests the pressure switch to determine if it is working properly, or if it is starting to fail which can cause the furnace to run in an unsafe manner. Plus, with the SDMN6 you can easily calibrate any adjustable pressure switch to manufacturers' specification, so there's no need to carry a large variety of pressure switches on your truck.The Dual Port Manometer has the ranges to measure gas pressure and the resolution needed to measure static pressure. Ideal for HVACR field service technicians, the SDMN6 can determine if the gas pressure coming into the house or out of the regulator are correct. The SDMN6 measures gas pressure up to 60" water column (WC) with a resolution of 0.1" WC. In addition, the unit measures both positive and negative pressure, which is used for measurement on vacuum control lines. The unit will take differential pressure readings and display the difference between P1 and P2 at all times in the lower right corner of the easy-to-read LCD. Four different measurement scales can be used: inches of water column, millimeters of water column, mBar, and PSI. Shipping and Handling Please allow 5-7 business days for the package to arrive, regardless of buyer location within the US. We will provide an online tracking number to you once the item has been shipped. It may take a few business days for our automated system to process the tracking number onto eBay. However, this will not affect the shipping times. Return Policy All our products are brand new and sealed. All items qualify for returns within 30 days of receipt. Feedback We take our reputation seriously. If you have any questions or concerns, please contact us and we will respond back to your message within 24 hours.