The Model 177 is a rugged benchtop ratemeter with alarming capability. These units are very popular for frisking operations at stations where line power is available but can also be used in portable applications for up to 50 hours using the internal rechargeable battery.
The Model 177 supports the Model 44-9 GM pancake detector and displays the results on a linear readout analog meter. The audio alarm is adjustable from 0 through 150% of full scale and is factory set to latching. Re-configuration to non-latching can be accommodated via a minor internal change.