• Mi-Glow 850S - RTU - Quart Spray Bottle

Mi-Glow 850S - RTU - Quart Spray Bottle

  • Brand: Circle Systems, Inc.
  • Product Code: FG-3642-1
  • Availability: Backorder - Estimated to ship 03/11/2024 (if ordered today!)
  • Note: This item is currently on backorder with an estimated ship date of 03/11/2024, you can place an order for this item and it will be shipped when it becomes available.
  • Price: $47.00

Available Options

Container Size Product Number
1-quart spray bottle FG-3642-1
Case of 6 x 1-quart spray bottles FG-3642


Circle Systems' Mi-Glow 850S - RTU is a ready to use, dual response, magnetic particle solution.

Mi-Glow 850S-RTU is a Ready-to-Use water bath packaged in a hand-held spray bottle. The bath contains Mi-Glow 601 red particles and liquid Wetting Agent 771. It is designed to be used with visible light for revealing discontinuities found in structural fabrications. Mi-Glow 850SRTU can be further enhanced when used with a black light or blue light.




  • Particle Color: Red
  • Concentration: 11.0 g/l
  • Particle Size: The typical range of particle sizes is from 6 to 80 μm, with an average particle size of 12 μm.
  • Particle Certification: Particles meet or exceed all relevant industry specifications. Certification is included with each shipment.
  • Temperature Limits: 32-120°F (0-49°C)
  • Shelf Life: One (1) year, when sealed bottles are not subjected to excessive heat or cold. A Certificate of Shelf Life is available upon request.


Directions for Use

  • Preparation: Thoroughly shake the bottle, insert the spray nozzle and apply to the parts for inspection.
  • Lighting: A minimum of 100 foot candles (1000 lux) of visible light at the part surface per ASTM E 709 and ASTM E 1444 is recommended.
  • Concentration Test: If it becomes necessary to verify the concentration in the bottle, thoroughly shake the bottle and the method of test should be as follows:
    • Fill a 100 ml graduated centrifuge tube as specified in Guide E709, or equivalent, to the 100 ml mark with suspension directly from the bottle. Demagnetize the suspension, if considered necessary, and let it stand undisturbed for a minimum of 60 minutes or until completely settled.
    • Read the volume of the precipitate in the graduate. The recommended volume is between 1.2 to 2.4 ml.
  • Lighting:
    • Visible Light Inspection - White light providing at least 100 foot candles (1,000 lux) at the part surface is recommended
    • UV Light Inspection - UV-A light providing at least 1000 microwatts/cm2 at the part surface is recommended


Container Size Product Number
1-quart spray bottle FG-3642-1
Case of 6 x 1-quart spray bottles FG-3642


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