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Dynalco SPD-108L Signal-Powered Digital Tachometer

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Dynalco Signal-Powered Digital Tachometer 4-Digit - SPD-108L

Product Condition: NEW
Dynalco SPD-108L Signal-Powered Digital Tachometer, 4-Digit, Lighted
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

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The Dynalco SPD-108L Signal-Powered Digital Tachometer is the lighted vesion of Dynalco SPD-108 tachometer that features a standard SAE case size that fits panels with 3-3/8 inch openings. This solid-state digital tachometer gauge also features a 4-digit, lighted LCD display with gate time range of 0.13 to 2.85 seconds field-programmable. Intrinsically safe and can be used in hazardous environments.


  • Signal and power derived totally from magnetic pickup or pulser.
  • Intrinsically safe. Can be used in hazardous environments with approved Dynalco pickups.
  • No power supply connections. High immunity to electrical noise.
  • Can be field-calibrated.
  • High accuracy: 1 rpm resolution.
  • High shock and vibration resistance.
  • Standard SAE case size fits panels with 3-3/8 inch (86 mm) openings.
  • Gasketed and spray-proof.
  • Ideal for OEM use.
  • Can be paralleled with governors and/or speed switches.
  • Can share existing pickups or pulsers; draws only microamperes.
  • Ground-free terminals have no polarity; easy installation.

Product Specifications:

  • Part No.: SPD-108L
  • Description: Signal-Powered Digital Tachometer, Lighted
  • External Power Requirements: All models are signal-powered. Lighted versions: 12 or 24 Vdc, depending on model
  • Display: Four active digits (0 to 9999), non-blinking LCD display; character height of 0.5 inches (14 mm). Display contrast increases with
  • increasing ambient light
  • Input Valve Voltage: From pickups, pulsers, shaft encoders, etc; Minimum signal amplitude: 2.5 Vrms; Maximum permissible signal: 15 Vrms. The SPD-100 automatically limits pickup signals at approximately 10 volts peak-to-peak. Input impedance is 100 Ohms in series with a 6 volt Zener diode.
  • Input Signal Frequency: Maximum input signal frequency of 20,000 Hz. Lowest frequency range limited by gate time and corresponding numerical display.
  • Isolated Circuit: All circuitry is totally floating, i.e. totally isolated and insulated from the case and from ground.
  • Operating Temperature Range: –5oF to +175oF (–20oC to +80oC)
  • Storage: –40oF to +195oF (–40oC to +90oC)
  • Vibration: MIL STD 810C; Method 514.2; Curve Q; Procedure V; Modified to 500 Hz upper limit. 5 Hz to 10 Hz @ 0.2 inches D.A.; 10 Hz to 18 Hz @ 1.0 g (peak); 18 Hz to 57 Hz @ 0.06 inches D.A.; 57 Hz to 500 Hz @ 10 g (peak)
  • Accuracy: One rpm resolution; within 0.5% (0.1% typical at room ambient) under all combined environmental conditions
  • Gate Time Ranges: SPD-108 Series: field-selectable from 0.13 to 2.85 seconds This accommodates calibrations for an extremely broad range of corresponding pulses per second.
  • Magnetic Pickups: Dynalco Magnetic Pickups M102 and M107 are used with the SPD-100 Series in most applications. Refer to Dynalco Magnetic Pickup brochure for various types and characteristics. For low-speed applications, or to permit operation with larger gaps, the ultrahigh
  • sensitivity M142 can be used. For intrinsically safe applications Dynalco Controls offers various models, with the M202 and M134 the most frequently used.
  • Weight: 1 lb (0.45 kg)

Additional Information

Product Condition NEW
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