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Transparent electrochemical oxygen sensor with cylindrical housing and gold contacts

MSA

MSA 480566 Electrochemical Oxygen Sensor Transparent

SKU CH-CT4T-D9XT3

Electrochemical oxygen sensor measuring 0–25 % vol with 15 s response time for Microgard portable detectors

  • ColorTransparent
  • Detects oxygen from 0 to 25 percent volume for accurate monitoring
  • Responds in 15 seconds for rapid hazard awareness
  • Fits Microgard Passport portable detectors for direct replacement
  • Compatible with multiple Grainger part numbers for flexible sourcing
  • Two-year sensor life reduces maintenance frequency

Oxygen sensor for Microgard detectors

The MSA 480566 is an electrochemical oxygen sensor designed for portable Microgard gas detectors. It measures oxygen concentrations from 0 to 25 percent by volume. Safety professionals and facility managers use it to maintain accurate atmospheric monitoring in confined spaces and industrial environments.

Transparent housing with direct plug-in mounting

The transparent body allows visual inspection of the sensing element without removing the unit. It connects directly into compatible Microgard instruments including the Passport series and models referenced by Grainger part numbers 33RJ32 through 6RRA1. No wiring or adapters are required for installation.

Two-year operational life with rapid response

The sensor delivers a T90 response time of 15 seconds, providing timely oxygen readings during routine checks or emergency entry. Rated for a two-year service life under normal operating conditions. It draws minimal power from the host detector, contributing to extended instrument run time between charges.

Highlights

  • Detects oxygen from 0 to 25 percent volume for accurate monitoring
  • Responds in 15 seconds for rapid hazard awareness
  • Fits Microgard Passport portable detectors for direct replacement
  • Compatible with multiple Grainger part numbers for flexible sourcing
  • Two-year sensor life reduces maintenance frequency

Specifications

ColorTransparent
BrandMSA SAFETY

Questions about this item

What measurement range does the 0 to 25 percent vol oxygen sensor cover?

The sensor measures oxygen concentrations from 0 to 25 percent by volume, which is the standard range for confined-space and ambient-air monitoring with compatible Microgard detectors.

Which portable detector models accept the 480566 sensor for installation?

It fits Microgard series detectors and the listed Grainger part numbers 33RJ32, 33RJ33, 33RJ34, 33RJ42, 45KE54, 481P57 through 481P65, 6RPZ6 through 6RPZ9, 6RRA0 and 6RRA1, plus manufacturer part number Passport.

How is the electrochemical oxygen sensor installed and what common step is missed?

Power off the detector, remove the old sensor, insert the new 480566 unit until it seats firmly, then power on and allow the 15-second T90 response time before calibrating; skipping the warm-up and calibration step is the frequent error.

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