• 3550-NIST Comes with Certificate of traceability to NIST Standards
• Designed according to IEC651 (Type 2) and ANSI S1.4 (Type 2) standards
• A/C frequency weighted readings
• Fast/slow response time
• 31.5Hz to 8kHz frequency range

The Triplett 3550 SoniChek PRO Professional Sound Level Meter is a professional sound level meter designed to be used in industrial applications where ANSI standards are called for. This highly accurate meter was designed according to IEC651 (Type 2) and ANSI S1.4 (Type 2) standards. Its large backlit display and A/C weighting make it an ideal choice for any installer. Overall, the SoniChek PRO is well suited for a variety of commercial and residential applications such as fire alarm, home theater, plant maintenance, HVAC installations and more. 3550-NIST Comes with Certificate of traceability to NIST Standards