Pricing on request. Contact sales@cryomagnetics.com or your local sales representative for a quote.
Liquid Helium Level Sensors
Cryomagnetics' line of superconducting liquid helium level sensors offer low liquid helium consumption and proper venting in any mounting orientation. These level sensors work with all Cryomagnetics' liquid helium level instruments including the Model LM-510 Liquid Cryogen Monitor.
Cryomagnetics' line of superconducting liquid helium level sensors offer low liquid helium consumption and proper venting in any mounting orientation. These level sensors work with all Cryomagnetics' liquid helium level instruments including the Model LM-510 Liquid Cryogen Monitor.
Standard sensors are available in three different outside diameter sizes and in active sensing lengths from 1 cm to 200 cm, in integral multiples of 1 cm. Each sensor has an overall length 2 cm greater than the active sensing length. All standard sensors are provided with four 30 cm 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 Features
Low liquid helium consumption
Proper venting in any mounting orientation
Compatible with Cryomagnetics' liquid helium level instruments
Four 30 cm long #30 AWG teflon-insulated leads
Color-coded, twisted phosphor-bronze leads available
Custom configurations available
Standard sensors are available in the following configurations.
| Model | Outside Diameter | Active Sensing Lengths | Overall Lengths |
|---|---|---|---|
| 2D | 4.76 mm O.D. (3/16″) | 1 to 43 cm | Up to 45 cm |
| 3D | 6.35 mm O.D. (1/4″) | 1 to 109 cm | Up to 111 cm |
| 3DA* | 6.35 mm O.D. (1/4″) | 1 to 109 cm | Up to 111 cm |
| 4D | 9.52 mm O.D. (3/8″) | 110 to 200 cm | Up to 202 cm |
| FLEX | 9.52 mm O.D. (3/8″) Flexible | Up to 200 cm | Up to 202 cm |
*3DA features a hermetically-sealed electrical connector on top of the sensor. Top 152 mm (6″) of the sensor is 6.35 mm (1/4″) O.D. stainless steel tubing, allowing easy removal with compression fitting on dewar.
Model Number – Active Sensing Length (cm) – Overall Length (cm)
Example: 3D-56-58 = 1/4″ O.D. sensor with 56 cm active sensing length and 58 cm overall length.
SensorModel 2D Liquid Helium Level Sensor (3 – 45 cm OAL)
Small-diameter (3/16″) LHe level sensor. Active sensing lengths 1–43 cm.
- SKU
- Model 2D LHe Sensor
- Outer diameter
- 4.76 mm (3/16″)
- Active sensing length
- 1 to 43 cm
- Overall length
- 3 to 45 cm
- Weight
- 2 lbs
- Dimensions
- 10 × 10 × 10 in
SensorModel 3D Liquid Helium Level Sensor (3 – 111 cm OAL)
Standard-diameter (1/4″) LHe level sensor. Active sensing lengths 1–109 cm.
- SKU
- Model 3D LHe Sensor
- Outer diameter
- 6.35 mm (1/4″)
- Active sensing length
- 1 to 109 cm
- Overall length
- 3 to 111 cm
- Weight
- 2 lbs
- Dimensions
- 10 × 10 × 10 in
SensorModel 3DA LHe Level Sensor (16 – 111 cm OAL)
1/4″ LHe level sensor with hermetically-sealed connector. Active sensing lengths 1–109 cm.
- SKU
- Model 3DA LHe Sensor
- Outer diameter
- 6.35 mm (1/4″)
- Active sensing length
- 1 to 109 cm
- Overall length
- 16 to 111 cm
- Weight
- 3 lbs
- Dimensions
- 10 × 10 × 10 in
SensorModel 4D Liquid Helium Level Sensor (112 – 202 cm OAL)
Large-diameter (3/8″) LHe level sensor. Active sensing lengths 110–200 cm.
- SKU
- Model 4D LHe Sensor
- Outer diameter
- 9.52 mm (3/8″)
- Active sensing length
- 110 to 200 cm
- Overall length
- 112 to 202 cm
- Weight
- 2 lbs
- Dimensions
- 20 × 20 × 20 in
SensorModel 4D Flexible LHe Level Sensor (3 – 202 cm OAL)
Flexible 3/8″ LHe level sensor for horizontal room-temperature bore dewars.
- SKU
- Model 4D Flex Sensor
- Outer diameter
- 9.52 mm (3/8″) flex
- Active sensing length
- 1 to 200 cm
- Overall length
- 3 to 202 cm
- Weight
- 4 lbs
- Dimensions
- 10 × 10 × 10 in