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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

  • Product 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.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $345.99
Pricier than about 86% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameAMPROBE
Product 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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