Cryomagnetics' Line of Superconducting Liquid Helium Level Sensors offer low liquid helium consumption and proper venting in any mounting orientation. Cryomagnetics' level sensors are compatible for use with all Cryomagnetics' liquid helium level instruments including the Model LM-500 Liquid Cryogen Monitor.
Standard sensors are available in three different outside diameter sizes and in active sensing lengths from 1cm to 200cm, in integral multiples of 1cm. Each sensor has an overall length 2cm greater than the active sensing length. All standard sensors are provided with four 30cm long #30 AWG teflon insulated leads for internal cryostat connections (color-coded, twisted phosphor-bronze leads are available).
Custom sensors with longer inactive
sections are quoted per your specifications.
Standard Sensor
(2D, 3D, 4D) |
 |
Available Models
| Model |
Outside Diameter |
Active Sensing Lengths |
| 2D |
4.76 mm O.D. (3/16") |
1 to 43 cm active sensing length |
| 3D |
6.35 mm O.D. (1/4") |
1 to 109 cm active sensing length |
| 3DA* |
6.35 mm O.D. (1/4") |
1 to 109 cm active sensing length |
| 4D |
9.52 mm O.D. (3/8") |
110 to 200 cm active sensing length |
| FLEX |
9.52mm O.D. (3/8") Flexible |
Up to 200 cm active sensing length |
* Features a hermetically-sealed electrical connector on top of the sensor. Top 152mm (6") of the sensor is 6.35mm (1/4") O.D. stainless steel tubing. This allows the sensor to be easily removed when used with a compression fitting installed on the dewar (not included).
To order, specify by:
Model Number and Active Sensing Length (cm)
Please click on the following
links for more information:
Please note that liquid helium
level sensors are custom-built to order and are not returnable. If you have any questions, please contact us before ordering.
| Product |
Price |
Shop |
Model 2D Liquid Helium Level Sensor (1 - 43 cm ASL)
The Model 2D LHe Level Sensor has an outside diameter of 4.76 mm O.D. (3/16"). It is available in active sensing lengths of 1 to 43 cm. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 30 cm in length. Available are low-loss phosphor-bronze hookup leads. Please specify active sensing length on order.
|
$225.00 |
 |
Model 3D Liquid Helium Level Sensor (1 - 77 cm ASL)
The Model 3D LHe Level Sensor has an outside diameter of 6.35 mm O.D. (1/4"). It is available in active sensing lengths of 1 to 77 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 30 cm in length. Available are low-loss phosphor-bronze hookup leads. Please specify active sensing length on order. |
$200.00 |
|
Model 3D Liquid Helium Level Sensor (78 - 93 cm ASL)
The Model 3D LHe Level Sensor has an outside diameter of 6.35 mm O.D. (1/4"). It is available in active sensing lengths of 78 to 93 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 30 cm in length. Available are low-loss phosphor-bronze hookup leads. Please specify active sensing length on order. |
$275.00 |
|
Model 3D Liquid Helium Level Sensor (94 - 109 cm ASL)
The Model 3D LHe Level Sensor has an outside diameter of 6.35 mm O.D. (1/4"). It is available in active sensing lengths of 94 to 109 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 31 cm in length. Please specify active sensing length on order. |
$325.00 |
|
Model 3DA LHe Level Sensor (1 - 109 cm ASL)
The Model 3DA LHe level sensors features a hermetically-sealed electrical connector on top of the sensor. Top 152mm (6") of the sensor is 6.35mm (1/4") O.D. stainless steel tubing. This allows the sensor to be easily removed when used with a compression fitting installed on the dewar (not included). Active sensing lengths of 1 - 109 cm are available at this price. Please specify active sensing length. A Cryomagnetics' technician will contact you concerning the other dimensions (A, B, and D). A 3-meter length interconnecting cable is included. |
$475.00 |
|
Model 4D Liquid Helium Level Sensor (110 - 128 cm ASL)
The Model 4D LHe Level Sensor has an outside diameter of 9.52 mm O.D. (3/8"). It is available in active sensing lengths of 110 to 128 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 30 cm in length. Please specify active sensing length on order. |
$400.00 |
|
Model 4D Liquid Helium Level Sensor (129 - 150 cm ASL)
The Model 4D LHe Level Sensor has an outside diameter of 9.52 mm O.D. (3/8"). It is available in active sensing lengths of 129 to 150 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 31 cm in length. Please specify active sensing length on order. |
$475.00 |
|
Model 4D Liquid Helium Level Sensor (151 - 180 cm ASL)
The Model 4D LHe Level Sensor has an outside diameter of 9.52 mm O.D. (3/8"). It is available in active sensing lengths of 151 to 180 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 31 cm in length. Please specify active sensing length on order. |
$575.00 |
|
Model 4D Liquid Helium Level Sensor (181 - 200 cm ASL)
The Model 4D LHe Level Sensor has an outside diameter of 9.52 mm O.D. (3/8"). It is available in active sensing lengths of 181 to 200 cm at this price. Overall length is 2 cm longer than the active sensing length (1 cm dead space on either end). The sensor is supplied with 4 teflon-insulated hookup leads 31 cm in length. Please specify active sensing length on order. |
$625.00 |
|
Model 4D Flexible LHe Level Sensor (1 - 200 cm ASL)
The flexible LHe level sensor is ideal to install in horizontal room temperature bore dewars. The flexible sensor will allow full measurement of liquid helium level where rigid sensors cannot. The outside diameter of the flexible sensor is 9.52mm (3/8"). Active sensing lengths are available up to 200cm. Please specify active sensing length on order. |
$525.00 |
|
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