Liquid Helium Level Sensors

Listing ID #3939442

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Supply Type Manufacturer, Exporter, Supplier
Preferred Buyer Location All over the world

The Model 150A is a lightweight, hand-held meter for use with helium storage dewars on loading docks or in storage rooms, or in remote helium level operations where line power is unavailable. The....

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Product Details

The Model 150A is a lightweight, hand-held meter for use with helium storage dewars on loading docks or in storage rooms, or in remote helium level operations where line power is unavailable. The Model 150A includes a 3.5 digit LCD display with readout accuracy of 0.5%, and a push-to-read switch that allows level measurements to made within seconds. The Model 150A is designed for use with AMI liquid helium level sensors up to 60" in active length.

Battery powered convenience

The unit is powered by a rechargeable, sealed lead-acid battery pack. The battery pack provides capacity for hundreds of readings between recharges. Also, a Model 150A with fully-charged batteries can be stored for up to a year at room temperature before battery recharging is required. The Model 150A is shipped with a battery charger.

Company Details

The rated field of each AMI magnet is the field at which the magnet can be operated continuously when immersed in liquid helium at a maximum temperature of 4.2K. Quench fields exceed the rated field in all cases. All standard magnets are tested by AMI in excess of the rated field. Warranted performance at lower temperatures and higher fields can be supplied on special order. Protection from damage in the event of a quench at fields up to and including the rated field is assured by the design and construction of the magnet. Each magnet is warranted against such damage by the standard AMI warranty.
All quoted currents are nominal and may vary slightly from the cited currents in the final magnet. The coil constant which specifies the magnetic field produced per ampere of current is supplied with each magnet. This constant is determined analytically for lower-homogeneity magnets, or by NMR measurements for high-homogeneity magnets.
Persistence of the magnetic field in the persistent mode varies with the inductance of the magnet and the conductor used in its construction. Guaranteed quotations can be provided upon request.
Homogeneities are specified as the maximum deviation from the central field at any point in the specified volume, and are usually quoted over a 1 cm diameter spherical volume. Where required, the homogeneity is verified using a 3 mm diameter NMR probe moved throughout the homogeneous volume.