The requirements for this contract are:
Lot 1 – This lot is designed to meet the Agency requirement for a device with very low battery consumption, low I/O, single communications and simple alarm functionality.
Lot 2 – This lot is designed to meet the Agency requirement for a device with the functionality to operate at our more complex sites requiring increased communication resilience and high I/0. Typically, sensors are sampled every few seconds.
Lot 1 – is then subdivided into lots 1a and 1b to cover the use of 4-20mA, SDI:12 and Modbus sensors. The requirements for each sub lot are different.