American Magnetics
AMI Model 1700
The new Model 1700 Liquid Level Instrument.
- 4.3" TFT Color Touch Display
- Reads LN2 , LHe ( Option ) or both simultaneously
- RJ 45 Ethernet Port / RS-232 Serial Port
- Level bases Valve Control
- No Oscillator/ Transmitter required for instrument to sensor distances of <15feet
- Reads either 4.2K or 2K LHe Sensors
- RoHs compliant and CE marked
- Remote operation via web browser when using ethernet
- 0-10Vdc recorder Output
- 4-20mA Control Loop
Liquid Helium Level Monitor Model 135
The Model 135 is an advanced liquid helium level monitor which incorporates AMI's patented sample-and-hold design with automatic helium level sensor vacuum burnout protection. The Model 135 is ideal for operation in systems where it is important to monitor the liquid helium level while also minimizing the helium losses. Microprocessor-based electronics provide 0.1% readout accuracy. Nonvolatile, read only memory maintains instrument calibration without battery backup. Watchdog timer circuitry and low line voltage (brownout) detector prevent microprocessor lock-up and provide fail-safe operation.
Liquid Helium Level Monitor Model 135-2K
The Model 135-2K is an advanced liquid helium level monitor which incorporates AMI's patented sample-and-hold design with the ability to provide uninterrupted level readings over a temperate range of 1.8 to 4.2K. The Model 135-2K is ideal for operation in systems where it is important to monitor the liquid helium level where transitions through the Lambda Point are needed. Automatic helium level sensor vacuum burnout protection is a standard feature. Microprocessor-based electronics provide 0.1% readout accuracy. Nonvolatile, read only
memory maintains instrument calibration without battery backup.
Watchdog timer circuitry and low line voltage (brownout) detector
prevent microprocessor lock-up and provide fail-safe operation. AMI
highly recommends using the specially designed 2K helium level sensor
with this instrument for best results.
Liquid Helium Level Controller Model 136
The Model 136 is an advanced liquid helium level controller which incorporates AMI's patented sample-and-hold design with automatic helium level sensor vacuum burnout protection. The Model 136 is ideal for unattended operation in systems where it is important to monitor and control the liquid helium level while also minimizing the helium losses.
Liquid Helium Level Meter 110
The low-cost Model 110A liquid helium level meter reliably measures the helium level in a dewar. A 3.5 inch analog display provides 0-100% liquid helium level indication. A 0-10 V recorder output is provided on the rear panel of the instrument. The Model 110A can be used with any AMI liquid helium level sensor
up to 60 inches in active length.
The Model 110A is commonly used for quick and accurate level indication in portable helium storage containers such as those pictured here. Simply plug the unit into the nearest outlet, read the level in percent and then covert to volume using the transport dewar strapping sheet. Level sensors can be built-in by the dewar manufacturer or provided direct from AMI with a metal top sleeve for sealing through the withdrawal port using the standard compression fitting. Simple sheet metal brackets are used to create a platform for the level instrument.
Handheld Portable Liquid Helium Level Meter Model 150
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.
Liquid Helium Level Meter and Dipstick Model 160
The Model 160 Liquid Helium Level Superconducting Dipstick is designed for measuring the level of liquid helium storage dewars that are accessible from the top. Battery operated and easy to use, the Model 160 offers ultra-low helium consumption and outstanding accuracy and repeatability. The dipstick is a cost effective, low-loss, and accurate alternative to flutter tubes and carbon resistor liquid helium level measuring devices.
The Model 160 consists of a superconducting point sensor mounted on a 72" extension tube with 6 feet of cable connecting the sensor to the hand held electronics enclosure.
The electronics enclosure is small, lightweight, and completely detachable from the sensor for ease of operation. This point sensor is provided on a Rigid fiberglass wand.
The Model 160 can be used to monitor the presence of liquid helium, such as in the case of determining the liquid helium level in a storage dewar. When the sensor makes contact with the liquid helium, an audible alarm and LED will energize. The Model 160 can also be alternately configured to indicate when the liquid helium has lowered to a predetermined level by "fixing" the dipstick at a level in the liquid helium. When the liquid helium level lowers to the point of breaking contact with the dipstick, the audible alarm and LED will energize. This device offers highly accurate level determination and is an excellent alternative to unreliable flutter tubes or carbon resistor devices.
