Casella CEL Inc. CEL-251 1/2-inch Precision Microphone Free Field Incidence
SMeasurement Microphones for the Advanced Sound Level Meters
A range of high quality measurement microphones are available for the CEL-620 and 630 series of instruments. The CEL-252 is provided as standard on the ANSI/IEC type 2 ¿ versions of the meters while the CEL-251 is the preferred capsule for the meters complying with ANSI/IEC type 1 classification. The CEL-250 is available as a replacement for the earlier CEL-440, 450, 480 or 490 models in the type 1 category. The microphone and preamplifier combination is fixed on the CEL-620 series analyzers bur uses a removable preamplifier, CEL-495, on the CEL-63 that enables these meters to be used for remote microphone mounting when necessary.