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Compact handheld sound level calibrator with 1/2 inch adapter and 9V battery included

Amprobe

Amprobe SM-CAL1 Sound Level Calibrator 1000 Hz 114 dB

SKU CH-5WMK-09EVX

Calibrates sound-level meters at 1000 Hz and 114 dB with ±0.5 dB accuracy

  • TypeDigital Multimeters
  • Calibrates meters at a precise 1000 Hz reference tone
  • Delivers 114 dB output for accurate SPL verification
  • Frequency accuracy within ±4 % ensures reliable readings
  • Output level held to ±0.5 dB for consistent calibration
  • Operates from 32 °F to 104 °F with included 9 V battery

Sound Level Calibrator for SM-10 and SM-20A

The Amprobe SM-CAL1 is a dedicated sound level calibrator designed to verify the accuracy of compatible meters. It serves technicians and engineers who require reliable reference output for SM-10 and SM-20A models during field or bench checks.

114 dB output at 1000 Hz with stated tolerances

The calibrator produces a sound pressure level of 114 dB at a frequency of 1000 Hz. Output sound accuracy is within +/- 0.5 dB while frequency accuracy is held to +/-4 percent. Distortion is limited to +/- 0.5 dB across the operating range of 32 to 104 degrees F.

Includes 1/2 in adapter and 9V alkaline battery

A 1/2 in adapter is supplied to fit the microphone capsules of the listed meters. One 9V alkaline battery is included so the unit is ready for immediate use without additional purchases.

Highlights

  • Calibrates meters at a precise 1000 Hz reference tone
  • Delivers 114 dB output for accurate SPL verification
  • Frequency accuracy within ±4 % ensures reliable readings
  • Output level held to ±0.5 dB for consistent calibration
  • Operates from 32 °F to 104 °F with included 9 V battery

Specifications

BrandAMPROBE
TypeDigital Multimeters

Questions about this item

How do I fit the 1/2 in adapter onto the calibrator for my SM-10 or SM-20A meter?

Push the supplied 1/2 in adapter firmly over the calibrator's output nozzle until it seats fully; the meter's microphone capsule then slides into the adapter for a tight acoustic seal.

What battery will I need to replace and how often?

A standard 9 V alkaline cell powers the unit; replace it when the output level drifts or the calibrator fails to start, typically after many hours of intermittent use.

At what temperature does the calibrator stop meeting its +/-0.5 dB accuracy spec?

The rated accuracy holds between 32 °F and 104 °F; outside that range the 114 dB output at 1000 Hz can deviate by more than the stated tolerance.

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