RPM Controller / Transmitter
Model : RP 491
Display : 4 Digit 0.5” 7 segment Red LED
Range : 10 - 9999 RPM / RPS / RPH
Inputs: 3 - 30V DC from Proximity Sensor, Photoelectric Non Contact Sensor, Encoder, Potential Free Contacts, Limit Switch etc.,.
- Introduction
- Specifications
- Key Features
Product Details
The RPM Controller / Transmitter is a reliable and versatile device used for measuring revolutions per minute (RPM) in various applications. With its advanced features and precision, the RP 491 offers accurate monitoring of motor and shaft speeds. Equipped with user-friendly controls and a clear display interface, it provides operators with real-time feedback essential for maintaining optimal performance and preventing potential damage to machinery. Whether in automotive, industrial, or other settings, the RPM Controller and Transmitter is a trusted tool for ensuring efficiency and safety in rotational speed monitoring.
| Model | RP 491 |
|---|---|
| Display | 4 Digit 0.5” 7 segment Red LED |
| Input | 3 - 30V DC from Proximity Sensor, Photo electric Non Contact Sensor, Encoder, Potential Free Contacts, Limit Switch etc., |
| Range | 10 - 9999 RPM / RPS / RPH |
| Resolution | Resolution 0.001, 0.01, 0.1, 1 RPM / RPS / RPH (selectable) |
| Accuracy | ± 0.05 % (± 1 count) |
| Sensor supply | 12V DC (±10%) 50mA |
| Input speed | 3.5 kHz (Max.) |
| Power supply | 90 to 270V AC / DC 50Hz |
| Exponential | 10n = -3, -2, -1, 0, 1, 2 |
| Relay output | 2 NO , 2 NC 5A rated Relays(power ON Delay & Hysteresis provided) |
| Working temperature | 0 - 50 °C |
| Dimension | 96(H) X 96(W) X 65(D) mm |
| Cut out Dimension | 90(H) X 90(W) mm |
| Weight (Approx.) | 350 grams (Approx.) |
Note: Due to continuous product improvements, Published specifications may change with out notice
4 Digit seven segment LED display
Wide range 10 RPM – 9999 RPM
3 to 30V DC Input Pulse from any type Sensor
Allows Maximum 3.5 kHz Input Pulse Speed
12 V DC Sensor Supply
Universal Supply Voltage 90 to 270V AC / DC
Length Measurement & Control
Line Frequency Monitor & Alarm
All types of Speed / Rate / Frequency Monitoring & Control applications.

