equipment , purchase of equipment:temperature compatible electrochemical device , the bidder is required to supply a handheld and wireless dual-channel potentiostat / impedance analyzer along with all necessary accessories and a compatible climate-controlled environment setup. the system must support sequential electrochemical measurements using both screen-printed electrodes (spes) and conventional electrodes. system specifications ?•? dc potential range: ±2 v, •? ?maximum current range: ±3 ma •? eis frequency range: up to ~200 khz, ?•? should support following techniques- linear sweep voltammetry (lsv),?cyclic voltammetry (cv), ?square wave voltammetry (swv), differential pulse voltammetry (dpv),?normal pulse voltammetry (npv),?chronoamperometry (ca),??pulsed amperometric detection (pad) open circuit potentiometry (ocp),multistep amperometry (ma) electrochemical impedance spectroscopy (eis) with ?scanning frequency mode and fixed frequency mode •? internal memory: onboard storage with capability to transfer data to pc via software interface •? ?usb or battery-powered operation •? wireless connectivity with tablet or pc (e.g., via bluetooth or wi-fi) environmental control requirement to maintain a consistent, controlled testing environment, a minimum 1.5 ton air conditioner (ac) unit must be supplied and installed along with the system. ?software & data handling •? ?software must allow real-time monitoring and data transfer from internal memory to pc •? ?user-friendly interface with exportable data in standard formats deliverables •??handheld dual-channel potentiostat / impedance analyzer, •??spe connector & cell cable, •??required software •??1.5 ton air conditioner •??installation and commissioning •??user manual and documentation ?warranty & support •??minimum 1-year warranty on the entire system •??technical support and software updates during the warranty period