Model LM-500 Liquid Cryogen Monitor

Features include:

CE-Marked.

Simultaneous display of LHe and LN2 levels (with 2-channel option).

Separate control output for each channel.

Flexible computer control via the standard RS-232 interface (IEEE-488.2 available).

LabVIEWŽ drivers available at no extra charge.

United States Customer? On-line ordering is available to you!
Click here to access Cryomagnetics' on-line ordering system!

The LM-500 Liquid Cryogen Level Monitor is a compact instrument featuring all commonly requested functions controlled via the front-panel keypad. The simple keypad features keys with good tactile response (no membrane switches). Computer control is also easily managed via the standard RS-232 interface or an optional IEEE-488.2 interface.

The easy to read 2-line vacuum fluorescent display clearly indicates liquid cryogen level and all menu choices. The display represents the latest technology and features a wide viewing angle, high brightness, and long life.

The 2-channel option offers great flexibility. Following are configuration choices for the 2-channel option:

Both channels monitor separate liquid helium sensors
Both channels monitor separate capacitance-based sensors (LN₂, LNG, etc)
One channel monitors a single liquid helium sensor and the second channel monitors a single capacitance-based sensor.

Other options include analog output (either 0-1 volt or 4-20 mA), IEEE-488.2 interface, and rack mountable cabinet. LabVIEWŽ drivers are available at no additional charge. Click here to download LabVIEWŽ drivers for the LM-500.

Other Cryomagnetics' instruments include the Model TM-600 Cryogenic Temperature Monitor and the Model GM-700 Hall Effect Gaussmeter.

*Standard Features*
Bright two line vacuum fluorescent display	RS-232 interface
Sample and hold operation (1min to 99hrs)	Manual update or continuous operation
Sensor de-ice Cycle (LHe only)	LHe sensor filament burnout protection
Sensor calibration via front panel menu	Can drive sensors up to 200cm active
Control output with high and low setpoints (Open collector output standard, TTL output available by changing a jumper on the circuit board)	Level indication in centimeters, inches, or percent
Audible alarm	Adjustable constant current source

*Optional Features*
Option 001: Analog Output
Option 002: IEEE-488.2 Interface
Option 003: Two Sensor Readout with separate High and Low controller setpoints. Configurable to monitor either two each LHe or capacitance-based liquid level sensors, or one of each.
Option 004: 19" Rack Mountable Cabinet. Up to (3) LM-500's or any combination of Model LM-500's, Model TM-600's, or Model GM-700's can be mounted side-by-side in one 3.5" high rack.
Option 005: Line Voltage Controller Output

Check out our liquid helium level sensors and capacitance-based liquid level sensors!

sales@cryomagnetics.com
Please contact us for more information!

1006 Alvin Weinberg Drive
Oak Ridge, Tennessee 37830
USA
Phone: (865) 482-9551
Fax: (865) 483-1253

All information subject to change due to design improvements.
Updated 4/5/05.

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