Provide leasing services to supply and maintain all instruments and related equipment necessary to perform gas detection functions. Services to include continuous remote monitoring of the equipment through the internet, routine equipment maintenance, calibration and repair/replacement services, including gas replenishment. Proposer will own and maintain all instruments, servers, docking stations and accessory hardware. Instruments and Equipment: Supply all instruments and equipment necessary to perform gas detection functions as follows: A. Gas Monitors: Orange or Yellow monitors with internal sampling pumps, equipped with Oxygen(O2), Hydrogen Sulfide (H2S), Carbon Monoxide (CO) and Combustible Gas (LEL/CH4)LEL(Pentane) Sensors. 1. Manufacturer: a. Industrial Scientific Corporation – VTS-K1232010101Ventis® MX4 b. RAE - QRAE 3 c. MSA - Altair 4X d. Or Approved Equal