Check the listing for details. Ludlum Model T-1031-1 Gas Flow Timer. Condition: Used. Listed at 250.00 USD. The Model T-1031-1 is a digital gas timer intended to control the gas flow to and from detectors in a P-10 counting gas system at pressures less than 15 psi and flow rates of 100 cc/min or less. It has solenoid valves that are normally closed under loss of power and will cut off the flow of gas if power is lost.The unit provides timed control of two solenoid valves. ON and OFF times are set by removing the six cover screws and setting two sets of BCD dip switches. The times are adjustable between 1 and 99 minutes. The right switch represents the 1's digit and the left switch the 10's digit. The ON and OFF banks are labeled on the circuit board for ease of identification.Best results will be obtained by connecting both the inlet and outlet circuits of the detectors. Be aware that the outlet solenoid and any additional tubing downstream from the detector will increase restriction to flow and detector damage may occur if flow rates are excessive. The maximum recommended flow for the return side is around 100 cc/min. Make sure that the inlet circuit solenoid is upstream of the flow adjustment valve to prevent sudden uncontrolled flow to the detectors as the solenoid switches ON. 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. Internal Use Barcode: 1892, 2374 ,2375, 2376Location: 10E We stand behind our eBay store. Check out CHPSurplus here for various miscellaneous equipment at a low price.