The EsiWelma TW1-B electronic fuel flow meters have LNE-15272 rev.2 type examination certificate dated 26/08/2009 attesting to conformity with international directive OIML R117 (Metrological Instruments Directive) (liquid fuels).
In keeping with the aforesaid directive, the fuel flow meters can be supplied in two versions:- Standard version with electromechanical relay command output. – Non-sparking version with solid state relay command output, compliant with ATEX 2014/34/UE directive and with ATEX Ex nA IIC T4 X protection mode.
The display on the electronic fuel flow meters shows:- Price in local currency.- Dispensed fuel (volume/weight).- Unit price. For LPG applications, it also includes the volume – temperature compensation function according to the A.P.I. tables. The electronic fuel flow meters include the preset function of both price and fuel dispensed; they also interface with a remote PC (host) to provide dispensing data conforming to the protocol in use