Make Possible Flow Platon Flow Alarms for Glass VA Product Data Sheet DS1120 / \ Platon Floscan Infra-Red Flow Alarm Systems Platon Floscan sensors use an infra-red beam across the glass flowtube of a Variable Area (VA) flowmeter. Passage of the float between the sensor arms is detected, and logic within the electronics determines whether the float is above or below the sensor position. Electronics inside the sensor module gives an open collector transistor output, suitable for external logic circuits. Suitable for all gas flows, and liquid flows where the float is visible, the sensor is clipped to the back of the flowmeter frame, typically on a Platon NG/NGX Series (normal 100mm scale) or LG/LGX series (miniature 30mm scale) VA meter. Movement up and down the frame allows the sensor to provide a flow alarm at any point on the tube scale, as required. The sensor can also be supplied on Platon GU or SGUV style flowmeters. The optional mains interface and relay module is used to provide the DC power needed to drive the sensor electronics, plus a SPCO 8 Amp mains relay output. This relay acts as a slave to the transistor output from the sensor module. Each Floscan relay module has two output relays, and can be used to monitor two separate alarm sensors. Features • High or Low flow alarm • Intelligent: Knows whether float above or below sensor • Adjustable over full range of flowtube • Suitable for normal (NG/NGX) or miniature (LG/ LGX) flowmeters • DC output direct to standard logic circuits • Optional mains interface relay module I®MADEIN SHEFFIELD

Sensor Type Direction Logic Setting Position Temperature Environment Dimensions Sensor Cable Cable Functions Voltage Supply Output (Sensor Positioned with Cable Exit Down) Switch Points Specification IR Beam break detection Position of float above/below sensor established on first detection of float after power up Held by spring clip anywhere in flow tube operating range -5 to +50°C IP44 with cable exit downwards 22 x 66 x 30 (HxWxD) 5mm space needed behind frame. Spacer provided 2m, 3 core screened Red - positive Black - OV common White - Transistor output 12V nominal, 8V - 26VDC range at 25mA Open...

Floscan Sensor Tube/Frame Size 1 = Size 1 flowtube 2 = Size 2 flowtube 3 = Size 3 flowtube Fluid Type L = Liquid G = Gas All GIR Flowscan sensors are supplied with a fitting kit of retaining spring and two spacers for panel mounting of NGX/LGX and NG/LG frames. Option - Relay Module • SPCO Relay Output • LED Indicators Option - Relay Module The Floscan alarm optional mains power and slave relay output module is a DIN rail/surface mounted unit that provides DC power for one or two Floscan sensors. Each sensor output drives a relay in the module, allowing external signalling via volt free...

Relay Module Option Mains power interface Suitable for one or two Floscan sensors Hazardous Area Installation The GIR sensor is approved as intrinsically safe to EEx ia IIC T4. When used in hazardous areas the GIR sensor should be used with a 12Vdc supply, protected by 15 volt 100 ohm shunt diode safety barriers as - per RM&C drawing 2-W142. Because the GIR module requires 8V & 25mA for correct operation, the barrier chosen must have an end to end resistance of below 16ohms. (A suitable barrier is the MTL767, with 155 ohm resistance). The Platon relay module 58384 can be used to provide a control...