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REED Instruments R8090

REED R8090 Sound Level Calibrator, on a white background

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R8090 calibrator alone, with battery as included by the maker

Output sound pressure:
Two levels: 94 dB and 114 dB
Output frequency:
1000 Hz ±4%
Microphone compatibility:
Fits 0.5 in (12.7 mm) diameter microphones

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Package details

Model: R8090

The calibrator on its own, as the maker packages it: calibrator and battery.

Condition:
Confirm new or reconditioned on the listing
Quantity:
Confirm package quantity on the listing
Included essentials:
The calibrator on its own, as the maker packages it: calibrator and battery.

Important limit: Only calibrates meters with half-inch microphones; it is not a general-purpose acoustic source

Confirm condition, quantity and included accessories on the retailer’s listing.

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Specifications checked November 5, 2026. Full product details

Size and placement

Size and placement

Dimensions
4.7 × 2 × 1.7 in (120 × 51 × 43 mm)
Weight
4.6 oz (130 g)
Manufacturer specifications

REED Instruments REED R8090 Sound Level Calibrator

A Class 2 acoustic calibrator that outputs a 1 kHz test tone at 94 dB or 114 dB to verify the accuracy of sound level meters with half-inch microphones.

Which version should you buy?

Selected package: R8090 calibrator alone, with battery as included by the maker.

Selected package

  • R8090 Sound Level Calibrator

    This page

    Model: R8090

    What differs
    The calibrator on its own, as the maker packages it: calibrator and battery.
    Best for
    Checking a sound meter's accuracy before measurements.

Bundles and accessories

  • R8050-KIT and R8080-KIT

    Contents and availability

    The maker's field kits that bundle this calibrator with a sound level meter and a custom-foam hard case.

    Buyers getting a meter and calibrator together.

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

  • SC-05 is the name REED uses for this same calibrator inside its kit bundles.
  • A calibrator checks a meter's accuracy; it does not measure sound levels by itself.

Why people pick it

  • Gives a stable 1 kHz tone at 94 dB or 114 dB, the two reference levels conventionally used to check a sound meter, per the maker's page
  • Stated ±0.5 dB accuracy and compliance with IEC 60942 Class 2
  • Works with any meter that has a 0.5 in microphone, including the REED R8050 and R8080

Know before you buy

  • Only calibrates meters with half-inch microphones; it is not a general-purpose acoustic source
  • Does not measure anything itself: it verifies a meter, it is not a meter
  • Powered by a 9 V battery rather than a rechargeable cell

Full specifications

Output sound pressureTwo levels: 94 dB and 114 dB
Accuracy±0.5 dB
Output frequency1000 Hz ±4%
Microphone compatibilityFits 0.5 in (12.7 mm) diameter microphones
Power supply9 V battery
CertificationsCE; complies with IEC 60942 Class 2
Operating temperature32 to 104 °F (0 to 40 °C)
Operating humidity0 to 80%
Dimensions4.7 × 2 × 1.7 in (120 × 51 × 43 mm)
Weight4.6 oz (130 g)

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

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