The Meridian Compact and Meridian Posthole digital seismometers are a sensor and datalogger combined into a single unit. The sensor's response is described below.
| Manufacturer | Model | Period / Frequency | Sensitivity | RESP Filename | Source | Comments |
| Nanometrics | Meridian Posthole | 120 s / 0.0083 Hz | 1200 V/M/S | RESP.XX.NS353..BHZ.MeridianPosthole.120.1200 | Nanometrics | |
| Nanometrics | Meridian Compact Posthole | 20 s / 0.05 Hz | 753 V/M/S | RESP.XX.NS348..BHZ.TrilliumCompact20.20.753 | Nanometrics | |
| Nanometrics | Meridian Compact Posthole | 120 s / 0.00833 Hz | 754 V/M/S | RESP.XX.NS124..BHZ.TrilliumCompact120.120.754 | Nanometrics |
Nanometrics, Mary Templeton 5/26/2020