Speed Measurement and Control, Tachometers, Hour Meters /sites/default/files/literature/documents/Dynalco-Hour-Meters-Tachometers-Speed-Measurement.pdf Tags Dynalco Tachometer / Hour Meter with Alarm - MTH-103E Dynalco Signal-Powered Digital Tachometer SPD-100 Dynalco Speed Transmitter - CSA-CE Approved - Series SST-2000 Dynalco® Digital Speed Switch & Transmitter - Series SST-7000 Dynalco Tachometer - 2 Channel Universal Monitor - UM-200