Level-Eye & Wand

Level-Eye® Digital Liquid Level Gauge & Wand

  • Accurately measures liquid levels inside cryogenic tanks
  • Superior to mechanical floats
  • Displays remaining liquid in percentages
  • Rugged watertight aluminum display case
  • 2-year battery life
  • Compatible with most brands of portable cryogenic vessels

Description

Level-Eye® Digital Liquid Level Gauge & Wand

Level-Eye® is a digital gauge that uses precise percentage measurements to accurately measure liquid level capacities. The Level-Eye® digital liquid level gauge, plus appropriate wand (see Level-Eye Wand Sizing Guide PDF), offers a level of accuracy that traditional mechanical floats simply cannot match!

High Performance & Easy Calibration

  • Digital display shows exact percentage of remaining liquid product inside tank
  • Accurate and reliable solution for measuring cryogenic liquid levels
  • Rugged watertight aluminum display case
  • 2-year battery life
  • Compatible with most brands and models of portable cryogenic vessels
  • Easy calibration with a simple button sequence
  • Data stored in memory during battery change

Cryogenic Liquid Compatibility

Level-Eye® Head & Wand* can be used to measure non-conducting liquids, such as:

  • Nitrogen (N2)
  • Oxygen (O2)
  • Argon (Ar)
  • Carbon Dioxide (CO2)
  • Nitrous Oxide (N2O)

*Level-Eye® Wand is cleaned for oxygen service per CGA G-4.1

How to Install and Calibrate the Level-Eye®

Video for Bulk Tanks:

Specifications

Level-Eye® Digital Gauge

Level-Eye® Specification
Housing (Case)Aluminum
DisplayLCD
Storage & Operating Temperature Range-40°F to 175°F (-40°C to 80°C)
Accuracy± 2%
Moisture Proof Spec.IP65
Operating Voltage3VDC
Connection JackGold-plated Brass
Connection Stem & Nut304 Stainless Steel
O-Ring SealsTeflon, Viton
Telemetry Output4-20mA
Battery:Replaceable lithium-ion CR2477; approx. 2 yr. life

Level-Eye® Wand

Level-Eye® WandSpecification
Connection Fitting304 Stainless Steel
Connection JackGold-plated Brass
Wand304 Stainless Steel*
Spacers*PTFE* (Teflon)
O-Ring Seals*Teflon*, Viton*

* Gas-wetted materials

Level-Eye® Installation

The Level-Eye® installation (and calibration) should be performed BEFORE the filling process.

Only install the Level-Eye® head and wand onto an empty tank.

  1. IMPORTANT! Verify all the tank contents are removed and the tank is at atmospheric pressure.
  2. Verify the wand and sealing nut are the correct sizes for the targeted tank model.
  3. Verify that the O-ring Seal is in place on the sealing nut.
  4. Remove the old float rod from the knuckle on top of the tank.
  5. Remove the sealing nut from the Level-Eye wand, thread the nut into the tank knuckle, and wrench-tighten the nut. (NOTE: DO NOT over-tighten or damage may occur.)
  6. Guide the wand through the sealing nut and wrench-tighten the compression fitting. (NOTE: DO NOT over-tighten or damage may occur.)
  7. Remove the cover from the Level-Eye and insert the provided battery. Confirm that the LCD display turns on. (NOTE: Because the head is not yet connected to the wand, a “no symbol” will appear on the right side of the LCD.)
  8. Attach the cover onto the Level-Eye head. Hand-tighten firmly to fully engage waterproof seal.
  9. Ensure the O-ring is in place on top of the wand.
  10. Lift up the wingnut on the Level-Eye base to expose Brass Connector Jack #1.
  11. Push the Level-Eye head onto the wand firmly until both Brass Connection Jacks #1 & #2 are fully engaged with each other. (NOTE: There should be no gap or obstruction with the connection.)
  12. Hand-tighten the wingnut. (NOTE: DO NOT wrench-tighten or irreversible damage may occur that is not under warranty!)
  13. Ensure the “no symbol” is no longer displayed on the LCD screen. This confirms a proper electronic connection of the Level-Eye head with the wand.
  14. Proceed to low and high calibrations. (NOTE: The Level-Eye will NOT provide accurate readings until the entire low and high calibration process is complete. See reverse side for instructions.)

Battery Percentage Check

Level-Eye® is equipped with the ability to calculate the amount of battery power remaining and display it by percentages on the LCD screen at any time.

To check the battery level:

  1. Single press and release the “L” button to view the battery percentage remaining.

Level-Eye® Calibration

Level-Eye® calibration is a TWO-STEP PROCESS of setting the liquid level range from an empty (low) level to a full (high) level for your specific tank size and model.

IMPORTANT! Calibration must be performed DURING the filling process to calibrate correctly.

#1: Low Calibration

  1. Add 5 lb. (2.25 kg) of liquid to the empty tank.
  2. Wait 5-10 minutes to allow the wand to chill.
  3. Enter Calibration Mode on Level-Eye®:
    a. Hold the “L” and “R” buttons together for 5 seconds until the word “CAL” is displayed on the LCD, then release.
  4. Perform Low Calibration:
    a. As “CAL” is still displayed, hold down the “L” button for 5 seconds until “Lo” is displayed, then release.
    b. Wait for the word “CLo” to display on the LCD screen, confirming the low calibration is complete.

#2: High Calibration

  1. Fill the tank to its full capacity.
  2. Wait 5-10 minutes to allow the liquid in the tank to settle.
  3. Enter Calibration Mode again on Level-Eye®:
    a. Press the “L” and “R” buttons together for 5 seconds until the word “CAL” is displayed on the LCD, then release.
  4. Perform High Calibration:
    a. As “CAL” is still displayed, hold down the “R” button for 5 seconds until “Hi” is displayed, then release.
    b. Wait for the word “CHi” to display on the LCD screen, confirming the high calibration is complete.
  5. Level-Eye® should now display “100%.” Congratulations! You have a happy tank.

NOTE: If Level-Eye is ever reinstalled and used on another tank, or with a different liquefied gas, it MUST be re-calibrated to that tank and/or that specific gas to operate correctly.

PDF Downloads

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