This tender document outlines the requirements for the supply of Green House Gas (GHG) monitoring equipment to facilitate the monitoring the GHG flux of peatland restoration. This Invitation to Tender (ITT) seeks quotes from suitably qualified suppliers for the supply of portable greenhouse gas (GHG) monitoring equipment for use in peatland restoration monitoring programmes. The equipment will be deployed at field collar sites as part of a portable closed-chamber measurement system to quantify net ecosystem exchange (NEE), ecosystem respiration (ER), and methane (CH₄) flux at active peatland restoration sites.