Platon Flow Alarms For Glass VA
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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
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
- ATEX approval (Directive 94/9/EC)
- EMC approval (Directive 2004/108/EC)
Full Product Specification
| Sensor Type | IR Beam break detection |
| Direction Logic | Position of float above/below sensor established on first detection of float after power up |
| Setting Position | Held by spring clip anywhere in flowtube operating range |
| Temperature | -5 to +50ºC |
| Environment | IP44 with cable exit downwards |
| Dimensions | 22 x 66 x 30 (HxWxD) 5mm space needed behind frame. Spacer provided. |
| Sensor Cable | 2m, 3 core screened |
| Cable Functions | Red - positive Black - OV common White - Transistor output |
| Voltage Supply | 12V nominal, 8V - 26VDC range at 25mA |
| Output (Sensor Positioned with Cable Exit Down) |
Open circuit for low flow alarm, conducts for flow above switch point |
| Switch Points | For falling float, top edge of float at centre line of sensor. For rising float, switching occurs when base of float passes centre line |
| Approvals | ATEX approval (Directive 94/9/EC) EMC approval (Directive 2004/108/EC) |
Recommended Products
Floscan Mains Interface
The Floscan Mains Interface Relay Module is a DIN rail/surface mounted unit that provides DC power for one or two GIR (Floscan) Infra-red flow alarm sensors from any mains power source. Each sensor output drives a relay in the module, allowing external signalling via the 8 amp voltage free realy contacts. The two Floscan sensors can be high or low flow alarms (dictated by the sensor orientation) and can be on the same flowmeter tube, or on separate flowmeters. Energised relay normal conditions are displayed by LED indicators.
Platon GU Glass Tube VA Flowmeter
PLATON SAFETY HOUSED GAPMETER TYPE GU
Gapmeters type GU are glass tube Variable Area Flowmeters for direct display of liquid or gas flowrate. The GU housing provides a robust rigid frame, suitable for mounting directly into plant pipework, protecting the glass tube from pipework stress and random plant damage. The safety Perspex window gives good flow visibility, whilst protecting the operator. A safety blowout disc on the rear of the housing provides a relief vent for process fluids, in case of glass tube damage.
Glass tube VA flowmeters are simple and reliable in operation, and instantaneous in response – they offer flow visualisation to the operator, and the float rotation gives confirmation of correct meter performance. Standard tubes and floats offer low line pressure loss and a high resolution 100mm linear scale, fused into the glass tube. Fluid flow vertically upward through the tapered glass tube causes the float to rise to an equilibrium position. Flow rate is measured on the scale of the flow tube, along the top edge of the float.
The borosilicate glass tubes are individually scaled according to customers requirements, and individually flow calibrated.
FEATURES
Platon LGX/NGX Glass Variable Area Flowmeters
PLATON FLOWMETERS LGX/NGX
Standard or custom scaled glass tubes to suit process fluids and conditions
Range of process connections to fit pipework requirements
Brass or Stainless Steel end blocks with optional integral flow control valve
Supplied with studs for surface panel mounting
ACCURATE MEASUREMENT
Flow up the tapered tube lifts the float to an equilibrium position. Flow rate is then measured against the flat top edge of the float.
UKAS and Traceable Calibration
Roxspur Measurement & Control Ltd is an ISO 9001:2008 company, we offer UKAS and traceable calibration under BS/EN ISO17025 accredited procedures. Our certificate generation systems are purposely geared to meet the strict and specific requirement of the Aerospace industry.
Calibration
Based at our factory in Sheffield our accredited laboratories are available to provide either on-site or in-house calibration to either UKAS or national standards. We cover Temperature (up to 2,200ºC), Pressure (up to 1,200 bar), Flow (up to 2,500 L/min) and Electrical parameters and provide certification using the latest technology.
Our team of experienced on-site engineers hold accreditation for the on-site calibration of equipment including autoclaves, furnaces, thermocouples and probes, scales and balances, ovens and chambers, indicators and controllers, pressure and electrical. We cover the full spectrum of industry sectors. All calibration standards used meet the requirements of Table 3 of AMS 2750D, whether in the laboratory or on site, ensuring full compliance with the specification. To find out more about our on-site services please click here.
We supply thermocouples calibrated and certified to meet the requirements of Table 1 of AMS 2750D appropriate to customer specified usage.
Aerospace Heat Treatment Specialists
From the supply of a single thermocouple to fully managed service contracts, by working in partnership with our customers we can assist in obtaining and maintaining NADCAP approval. To find out more about our specialist aerospace services please click here.
Certification
Certificates generated are designed to meet the requirements of AMS 2750D with the option of UKAS certificates for added peace of mind.
Floscan Mains Interface
The Floscan Mains Interface Relay Module is a DIN rail/surface mounted unit that provides DC power for one or two GIR (Floscan) Infra-red flow alarm sensors from any mains power source. Each sensor output drives a relay in the module, allowing external signalling via the 8 amp voltage free realy contacts. The two Floscan sensors can be high or low flow alarms (dictated by the sensor orientation) and can be on the same flowmeter tube, or on separate flowmeters. Energised relay normal conditions are displayed by LED indicators.- High or low flow alarm
- Intelligent: knows whether float is above or below the sensor
- LED indicators
- SPCO relay outputs
- DIN rail mountable
Platon GU Glass Tube VA Flowmeter
PLATON SAFETY HOUSED GAPMETER TYPE GUGapmeters type GU are glass tube Variable Area Flowmeters for direct display of liquid or gas flowrate. The GU housing provides a robust rigid frame, suitable for mounting directly into plant pipework, protecting the glass tube from pipework stress and random plant damage. The safety Perspex window gives good flow visibility, whilst protecting the operator. A safety blowout disc on the rear of the housing provides a relief vent for process fluids, in case of glass tube damage.
Glass tube VA flowmeters are simple and reliable in operation, and instantaneous in response – they offer flow visualisation to the operator, and the float rotation gives confirmation of correct meter performance. Standard tubes and floats offer low line pressure loss and a high resolution 100mm linear scale, fused into the glass tube. Fluid flow vertically upward through the tapered glass tube causes the float to rise to an equilibrium position. Flow rate is measured on the scale of the flow tube, along the top edge of the float.
The borosilicate glass tubes are individually scaled according to customers requirements, and individually flow calibrated.
FEATURES
- Robust construction
- Instant flow rate visual indication
- Suitable for installation in unsupported pipework
- Flow tube scaled for any gas and most liquids
- Safety housed for operator protection
- Site interchangeable 140mm flowtubes
Platon LGX/NGX Glass Variable Area Flowmeters
PLATON FLOWMETERS LGX/NGX- Improved industrialised construction
- Easy to use, high visibility scale
- Rear ‘blow out’ safety vent
- Ergonomic design
- UV stabilised rigid safety cover
- Gas or liquid flow measurement
- Operator confidence from float rotation
- Instantaneous response
- Accuracy up to ±1.25% FSD
- Air flow range 5 mL/min to 150 L/min
- Customised scales
- Glass tube removal without tools
- ATEX Infra-red alarm option
- Range of accessories
- UKAS calibration optional
- Available from stock
- Next day delivery (subject to specification)
- After sales service and repair
Standard or custom scaled glass tubes to suit process fluids and conditions
Range of process connections to fit pipework requirements
Brass or Stainless Steel end blocks with optional integral flow control valve
Supplied with studs for surface panel mounting
ACCURATE MEASUREMENT
Flow up the tapered tube lifts the float to an equilibrium position. Flow rate is then measured against the flat top edge of the float.
UKAS and Traceable Calibration
Roxspur Measurement & Control Ltd is an ISO 9001:2008 company, we offer UKAS and traceable calibration under BS/EN ISO17025 accredited procedures. Our certificate generation systems are purposely geared to meet the strict and specific requirement of the Aerospace industry.Calibration
Based at our factory in Sheffield our accredited laboratories are available to provide either on-site or in-house calibration to either UKAS or national standards. We cover Temperature (up to 2,200ºC), Pressure (up to 1,200 bar), Flow (up to 2,500 L/min) and Electrical parameters and provide certification using the latest technology.
Our team of experienced on-site engineers hold accreditation for the on-site calibration of equipment including autoclaves, furnaces, thermocouples and probes, scales and balances, ovens and chambers, indicators and controllers, pressure and electrical. We cover the full spectrum of industry sectors. All calibration standards used meet the requirements of Table 3 of AMS 2750D, whether in the laboratory or on site, ensuring full compliance with the specification. To find out more about our on-site services please click here.
We supply thermocouples calibrated and certified to meet the requirements of Table 1 of AMS 2750D appropriate to customer specified usage.
Aerospace Heat Treatment Specialists
From the supply of a single thermocouple to fully managed service contracts, by working in partnership with our customers we can assist in obtaining and maintaining NADCAP approval. To find out more about our specialist aerospace services please click here.
Certification
Certificates generated are designed to meet the requirements of AMS 2750D with the option of UKAS certificates for added peace of mind.
