Level Measurement
Level Monitor
The Level Monitor provides a rugged and cost-effective means to measure liquid level for water and wastewater pumping applications.
When submersed in liquid, the Level Monitor converts the pressure exerted by the liquid into a 4-20mA analog signal that represents liquid level. The vent tube in the cable transmits atmospheric pressure down the cable to the reference side of pressure sensor, to correct for changes in atmospheric conditions.
A stainless steel diaphragm and silicone oil fill is provided to isolate and protect the pressure sensor from the liquid being measured.
The weight of the Level Monitor acts to reduce its movement when placed in a moving liquid. A Strength Cord in the cable provides ample support for its weight. In applications where strong currents are present, the 1/2" NPT fitting on top may be used to mount the Level Monitor in a fixed position.
A two stage surge suppressor circuit using both an MOV and TVS provide high voltage transient protection for the transducer circuitry.
The Transducer Vent Bellows (Part #: TVB1) must be purchased with the Level Monitor and be connected to the end of the vent tube. The TVB1 is required to prevent moisture from entering the vent tube.
The Level Monitor may be ordered with various lengths of cable, and with one of three pressures ranges 5, 10, or 15 psi ( 11.5, 23.1, or 34.6 Feet ).
When submersed in liquid, the Level Monitor converts the pressure exerted by the liquid into a 4-20mA analog signal that represents liquid level. The vent tube in the cable transmits atmospheric pressure down the cable to the reference side of pressure sensor, to correct for changes in atmospheric conditions.
A stainless steel diaphragm and silicone oil fill is provided to isolate and protect the pressure sensor from the liquid being measured.
The weight of the Level Monitor acts to reduce its movement when placed in a moving liquid. A Strength Cord in the cable provides ample support for its weight. In applications where strong currents are present, the 1/2" NPT fitting on top may be used to mount the Level Monitor in a fixed position.
A two stage surge suppressor circuit using both an MOV and TVS provide high voltage transient protection for the transducer circuitry.
The Transducer Vent Bellows (Part #: TVB1) must be purchased with the Level Monitor and be connected to the end of the vent tube. The TVB1 is required to prevent moisture from entering the vent tube.
The Level Monitor may be ordered with various lengths of cable, and with one of three pressures ranges 5, 10, or 15 psi ( 11.5, 23.1, or 34.6 Feet ).
Bubbler System
The BS2000 is a fully automatic dual compressor bubbler system with bubbler tube purge, tank moisture dump, system status indication, and system fault alarms. The unit provides a 4-20mA analog output representing level for use by other devices to perform pump control or telemetry functions. Tested to UL 61010C-1, the Standard for Process Control Equipment.
Level Probes
The Level Probes provides a rugged, safe, reliable and cost-effective means to measure liquid level for water and waste water pumping applications. The Level Probe may be ordered with one, three or ten electrodes with various spacings and two cable lengths. Intrinsically Safe for use in Class 1, Groups A, B, C, D. Class II, Groups E, F, G. Class III, Hazardous Locations when installed with Intrinsically Safe Barrier, MPE Model ISB10, in accordance with the MPE Drawing 0303.
Level Probe Relay
The Level Probe Relay senses liquid level and provides a relay output for controlling a pump or level alarm. The unit has two inputs, an ON and an OFF, for connection to two electrodes of a conductance probe. All setup is easily done using the DIP switches on the unit.
When used for a level alarm the ON and OFF inputs may be connected to the same electrode on the probe, or the ON input may be used by itself. When used for pump control the ON and OFF inputs are typically connected to two different level probe electrodes to provide a latching function.
The unit has two pump control modes, Pump Down (empty a tank) and Pump Up (fill a tank) (see table below). When in the Pump Down mode and both inputs detect liquid, the unit energizes the relay and keeps it energized until the level drops to the point where the OFF input no longer detects liquid. When in the Pump Up mode and both inputs detect no liquid, the unit energizes the relay and keeps it energized until the level rises to where the OFF input detects liquid.
The Sensitivity of the unit must be set for the type of liquid being detected (see the Dip Switch table). The unit provides a 10 second power up delay to prevent a pump from being turned on too soon after a power interruption. An adjustable ON Delay is provided for use as a lag pump delay. The adjustable OFF Delay is provided so that the unit may be used to provide timed off, backup pump control.
When used for a level alarm the ON and OFF inputs may be connected to the same electrode on the probe, or the ON input may be used by itself. When used for pump control the ON and OFF inputs are typically connected to two different level probe electrodes to provide a latching function.
The unit has two pump control modes, Pump Down (empty a tank) and Pump Up (fill a tank) (see table below). When in the Pump Down mode and both inputs detect liquid, the unit energizes the relay and keeps it energized until the level drops to the point where the OFF input no longer detects liquid. When in the Pump Up mode and both inputs detect no liquid, the unit energizes the relay and keeps it energized until the level rises to where the OFF input detects liquid.
The Sensitivity of the unit must be set for the type of liquid being detected (see the Dip Switch table). The unit provides a 10 second power up delay to prevent a pump from being turned on too soon after a power interruption. An adjustable ON Delay is provided for use as a lag pump delay. The adjustable OFF Delay is provided so that the unit may be used to provide timed off, backup pump control.
