MT90 digital tachometer
The Murphy Selectronic MT90 digital tachometer offers high accuracy and dependability resulting from use of a quartz crystal time-base and digital, solid-state electronics.
Tachometer power is supplied by either a Murphy magnetic pickup mounted at the flywheel ring-gear of an engine or by a 12-, 24- or 32-volt DC battery system.
RPM data is supplied by either a Murphy magnetic pickup or by the alternator in your battery charging circuit.
The MT90 tachometer also has backlighting for easy readings in low-lit areas.
The MT90 is calibrated to engine RPM by setting a series of calibration rotary switches on the back of the tachometer.
Typical applications include: generators, compressors, industrial engines, oil field equipment, marine vessels, vehicles, farm equipment and construction equipment.
Specifications:
- Signal Input Voltage: 4 to 35 Vrms from a magnetic pickup or alternator*
- Pulses per Revolution: 3 to 999
- Power Requirements
- Pickup Power: 4-35Vrms*
- Battery Power: 8-40 VDC (12, 24, 32 volt)
- Current:
- Tach backlight Off, 4mA @ 40 VDC
- Tach backlight On, 25 mA @ 40 VDC
- Case: 1018 polycarbonate/polyester blend
- Lens: Polycarbonate Bezel: #430 Stainless Steel
- Display: LCD, 4-digit, seven segment
- Operating Temperature: -4° to 158°F (-20° to 70°C)
- Storage Temperature: -13° to 185°F (-25° to 85°C)
- Mounting Hole: 3-7/16 in. (87 mm)
- Shipping Weight: 14 oz. (0.4 kg)
- Shipping Dimensions: 5-1/2 x 5-1/2 x 5-1/2 in. (140 x 140 x 140 mm)
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