Introduction

STs Series sensors are constructed from high-quality, durable materials that can be stored for long periods of time.  The only weak point is the electrode, which can be damaged or expire during storage in the wrong conditions.  These conditions vary depending on the type of electrode, which is why we have different storage instructions for each sensor.  Please navigate to your sensor of interest using the Table of Contents.

STs Series Terminology

STs Series pH and ORP Sensor Storage

Materials

• STs Series Sensor
• Storage Boot
  • Round vinyl pipe cap that is ¾ in. diameter by 3 in. height (One is provided with the purchase of each sensor)
• 3.0M KCl Solution
  • KCl is relatively harmless but may cause irritation if it enters the eyes or an open wound. Please follow the proper safety procedures and obey all local guidelines for disposal.
• Cotton Ball or Soft Tissue Paper
• Towel
• Electrical Tape (Or any tape that creates a strong waterproof seal while being easy to remove)

Instructions

1. Dry off the sensor using a towel.
2. Remove the electrode guard.
3. Clean the electrode to prevent oxidation and bacterial growth.  For best practices, please see the following guides:  pH Electrode Care  |  ORP Electrode Care
4. Dip the cotton ball or soft tissue paper in the KCl solution.

5. Place the wet cotton ball or tissue paper through the slots in the guard and snap the electrode guard in place over the bulb.

• • There should be enough tissue paper that the plastic guard presses it against the bulb but not so much that it is difficult to snap the guard in place.  If unsure of the right amount of tissue paper, it is best to be on the cautious side and use less to avoid putting excessive pressure on the bulb.

6. Fill the storage boot halfway with KCl solution.

7. Slide the boot fully over the STs Series electrode guard.

• Some KCl is expected to overflow so we recommend performing this procedure over a sink or container to catch the liquid.

8. Use electrical tape to secure the boot to the sensor and create a waterproof seal.

9. Store in an area with low humidity and temperatures less than 35°C.

STs Series Dissolved Oxygen Sensor Storage

Materials

• STs Series Sensor
• Storage Boot
  • A round vinyl pipe cap that is ¾ in. diameter by 3 in. height (One is provided with the purchase of each sensor)
• Soft Tissue Paper
• Towel
• Electrical Tape (Or any tape that creates a strong waterproof seal while being easy to remove)

Instructions

1. Dry off the sensor using a towel.
2. Remove the electrode guard.
3. Clean the electrode to prevent oxidation and bacterial growth. Please read this article for recommended cleaning procedures.
4. Dry the electrode by patting with a soft piece of tissue paper. Do not wipe or rub the tip or else damage may occur.
5. Twist the electrode body one full turn to disengage the electrode.
6. Slip the clean and dry storage boot fully over the electrode guard.

7. Use electrical tape to secure the boot to the sensor and create a waterproof seal. This prevents moisture from entering into the boot, which would reduce the lifespan of the electrode.

8. Store in an area with low humidity and temperatures less than 35°C.

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