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Magnetic Liquid Level Gauges
Series MLG
OPERATING PRINCIPLE
The Papailias Company Magnetic Gauge is a magnetic liquid level indicator used to determine the volume of liquid contained within a vessel. Because the Magnetic Gauge eliminates the need for glass, high pressure applications and hazardous locations are protected from the danger of a chemical spill due to glass failure.
The Magnetic Gauge utilizes three major components: the gauge housing chamber, the magnetic float, and the magnetic flag assembly.
The gauge housing chamber is mounted adjacent to the side of the vessel. It is constructed to withstand the same temperatures and pressures as the tank itself. It is equipped with the appropriate tank mounting connections for easy installation and to allow equalization of liquid level in tank and gauge.
Inside the gauge housing chamber is the magnetic float, which contains radially-positioned magnets to provide a 360 degree magnetic-flux field. Each float is internally weighted based on specific gravity so that the liquid level in the gauge coincides with the location of the magnets inside the float.
Attached to the gauge housing chamber is the magnetic flag assembly. This is the visual means of liquid level indication for the Magnetic Gauge. The assembly is made up of a series of bi-colored fluorescent flags. As the magnetic float rises and falls with the liquid level in the gauge housing chamber, a magnet embedded in each flag reacts to the 360 degree magnetic flux of the float. This magnetic interaction causes each flag to rotate 180 degrees. The flags below the magnetic flux of the float will flip to fluorescent green, while those flags above the float level remain bright white.
When your application priorities are safety, visibility and accuracy, the Magnetic Gauge is the low-maintenance, cost-effective solution.
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High or Low Level Switches
Switches are mounted to the exterior of the float chamber 180 degrees from the flag assembly and they are actuated by the same magnetic field that causes the bi-colored flags to flip. Switches may be wired to indicate a high or low level or in any intermediate position deemed important to the process.
Two types of switches are available; the non-latching and latching. The non-latching only remains actuated when the float is directly in line with the switch. The latching swing actuates and remains in the actuated position as the float rises past the switch. The switch returns to its initial position as the float lowers passing the switch.
See specifications below for more information.
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Series LS Latching Switch
UL Listed for Class I Groups C & D Class II, Groups E, F & G
Aluminum Housing
Switch SPDT, latching redd normally closed from C contacts.
Maximum temperature: 221 Degrees fahrenheit or 105 degrees celsius Consult factory for higher temperatures
Maximum switching volts: 100 VDC, 140 VAC
Maximum switch current: 0.20 Amps DC, 0.14 Amps AC
Maximum switch power: 4 Watts (4 V.A.)
1/2" NPT conduit connection
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Series NLS Non-Latching Switch
UL Listed for Class I Groups C & D Class II, Groups E, F & G
Aluminum Housing
Switch SPDT, non-latching reed normally open form A contacts
Maximum temperature: 221 degrees fahrenheit or 105 degrees celsius Consult factory for higher temperatures
Maximum switching volts: 100VDC, 140VAC
Maximum switch current: 0.25 Amps DC, 0.18 Amps AC
Maximum switch power: 7 Watts (7 V.A.)
1/2: NPT conduit connection
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Papailias Level Transmitters
The Papailias level transmitters offer 4-20mA loop-powered circuitry for level measurement. Zero and span may be adjusted using a weather-resistant toggle switch. Zero may be set at any location along the length of the transmitter with 100% zero suppression. Field replaceable elctronics are potted and encapsulated. Papailias transmitters are available as standard with NEMA 4X/7 type elctronics housings. These housings feature an industrial epoxy coating for corrosion resistance. All Papailias level transmitters use noncontacting magnetostrictive technology. This simple desgin ensures no scheduled maintenance or recalibration-ever.
| Parameter |
Specifications |
| Level Output |
. |
| Full Range |
0.5 to 25ft. (152 to 7.6m) |
| Nonlinearity Fullspan |
0.100% F.S (Independent BSI) or 1/32 in. (0.794 mm), whichever is greater. |
| Repeatability |
0.01% F.S. or 0.015 in. (0.381 mm), whichever is greater. |
| Temp. Sensitivity |
Zero: <0.003%/°F (0.005%/°C) |
| Sensor Operating Temp. |
Op. temp. is -30 to 300°F. Contact Papailias for higher temperature requirements. |
| Transmitter Loop |
. |
| Input Voltage Range |
10.5 to 36.1 Vdc |
| Reverse Polarity Protection |
Series Diodes |
| Safety Approval |
CSA certified explosion-proof Class 1, Division 1, Groups B, C, and D |
| Calibration |
. |
| Zero Adjust Range |
Anywhere within the active length |
| Span Adjust Range |
F5>0.5 ft. (152 mm) from zero |
| Environmental |
. |
| Sealing |
Potted sensor cartridge and electronics |
| Humidity |
0 to 100% R.H. |
| Operating Temperature |
-30 to 160°F (-34 to 71°C) |
| Materials |
304 stainless steel |
| Field Installation |
. |
| Transmitter Length |
Up to 25ft. (7.6 meters) |
| Wiring |
Two-wire connection, shielded cable or twisted pair to screw terminals through a 3/4 in. (12.7 mm) NPT conduit opening |
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