The A6.1.3.1.B.F6.5.I.N.B.0.A.A.A is a 6100 Series variable area purgemeter — an in-line flow indicator with a valve at the inlet (medium capacity, Size 2.2) and a low alarm switch (B = Low Alarm, without amplifier, only operates with SS or CA floats). The ATEX certification (II 2G Ex h IIC T6 to T4 Gb) means it is approved for Zone 1 gas environments with hydrogen-class gases (IIC) and temperature classes T6–T4, so it fits directly into hazardous-area purge and flow-monitoring loops without an additional barrier. Flow calibration is done using air or water as appropriate (Scale Type 5), and the 76 mm (3 in.) tube length (Tube Length 1) with a 3 mm (1/8 in.) tube diameter gives a compact footprint for panel-mount or in-line installation.
Configuration Details
Connection is 1/4 in. NPT Female (Connection Type 3), horizontal orientation (Connection 1). Materials: stainless steel fittings with Viton seals (Materials - Fittings / Seals I). No regulator (Regulator 0). The tube/float combination is F6 = FP - 1/8 - 08 - P - 3/37 + SS - 18, and the design level is A.