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Sentry |
| RDL 91xL: Sentry portable non-telemetry data logger, single channel, with LCD display, battery replacable. |
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Centurion |
| RDL 10xxL: Centurion portable or PSTN telemetry data logger, single or dual channel, with LCD display, battery replacable. |
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Senator |
| RDL 20xxL: Senator portable or PSTN telemetry data logger, upto 6 or 7 channels, with LCD display, battery replacable. |
