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Prova – RM-1500/1501 Digital Tachometer

The RM-1501/RM-1502 is a versatile handheld tachometer designed for both non-contact and contact measurements, ideal for industrial and laboratory use. It features a wide RPM range from 10 to 99,990 RPM, with precise readings thanks to high-resolution measurement and a 5-digit LCD display. The device includes advanced functions like event counting, max/min/hold, and true average calculation, while the measuring distance of 50–300 mm ensures flexible use in various environments. Its compact, lightweight design, along with RS-232C connectivity and optional RM-1502 adapter, makes data collection and integration simple and efficient.

  • Combination for non-contact and contact measurements
  • Measuring distance 50 ~ 300 mm
  • RPM range 10 – 99,990
  • 5-digit LCD display with event counter

Description

The RM-1501 provides accurate and reliable non-contact speed measurements using light reflex technology, covering a wide range of rotational speeds with excellent resolution and minimal error. The device also offers contact measurements of RPM, circumferential velocity, and linear speeds in m/min, ft/min, and yard/min when used with the RM-1502 adapter. Its intuitive interface includes an event counter with elapsed time, auto-ranging, max/min/hold, and true average functions, making it ideal for monitoring motors, pulleys, and other rotating machinery.

Designed for convenience, the tachometer features a 5-digit LCD display and supports RS-232C connectivity to USB for easy data transfer. Its compact and lightweight design, operating on four 1.5V AA batteries, ensures portability and extended battery life. The device’s automatic shut-off, versatile measurement modes, and rapid sampling rate make it perfect for high-precision, repetitive, and field-based measurements. Accessories including a carrying case, reflective tape, software, and instruction manuals enhance usability and efficiency.

Features

  • Combination for non-contact and
  • contact measurements
  • Measuring distance 50 ~ 300mm
  • Range 10.00 ~ 99,990 RPM
  • Light reflex measuring
  • 5 digits LCD display
  • Event counter with elapsed time
  • Max/ Min/ Hold, True Average
  • Auto range RPM
  • RS-232C to USB cable (RM-1501)
  • Contact RPM and circumferential
  • velocity measurement

Specifications

Parameter Range Resolution Accuracy
Speed (Non-contact)
RPM 10 – 99990 0.01 / 0.1 / 1 0.04% ±2 dgts / ±0.06 RPM
rps (Hz) 0.2000 – 2000.0 0.001 / 0.01 / 0.1 0.04% ±2 dgts
Speed (Contact)
RPM (Contact) 10.000 – 29999 0.001 / 0.01 / 0.1 / 1 0.04% ±2 dgts
m/min 1.000 – 2999.9 0.001 / 0.01 / 0.1 0.04% ±2 dgts
ft/min 3.000 – 10000 0.001 / 0.01 / 0.1 0.04% ±2 dgts
yard/min 1.000 – 3000 0.001 / 0.01 / 0.1 0.04% ±2 dgts
Event Counter
Range 0 – 99999 Max. Input Frequency: 10 kHz with 5% duty cycle
General Specifications
External TTL Input High > 4.5V (RM-1501)
Display 5 digits, 99999 counts
Sampling Rate 0.7 second (>60 rpm), >1 second (10 to 60 rpm)
Measuring Distance 50 to 300 mm
Time Base 4.0 MHz Quartz Crystal
Range Selection Automatic
Battery Four 1.5V AA (UM-3)
Power Consumption 1.5 mA (Idle), 27 mA (Non-contact), 34 mA (Contact)
Auto-Power-Off 30 minutes
Operating Temp. 0 to 50°C (32 to 122°F)
Size 172 × 63 × 36 mm (6.8″ × 2.5″ × 1.5″)
Weight 190 g / 6.7 oz (including battery)
Accessories 1. Carrying case
2. Reflective tape
3. Instruction Manual
4. 1.5V AA Batteries x4
5. RS-232C to USB cable (RM-1501 only)
6. Software CD (RM-1501 only)
7. Software Manual (RM-1501 only)
Option: RM-1502 Adapter for contact measurement

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