Audible / Visual Alarm Tachometers
Description
Audible/Visual Alarm Tachometers are devices designed to measure the rotational speed of a shaft or disk and provide an alert through audible and visual signals when certain speed thresholds are exceeded. These tachometers are equipped with alarms that can notify users of speed deviations, ensuring that machinery operates within safe and efficient parameters.
Working Principle
Audible/Visual Alarm Tachometers operate by detecting the rotational speed of a device using various sensor technologies such as photoelectric, inductive, or Hall effect sensors. These sensors measure the speed by detecting changes in light, magnetic fields, or electrical signals as the rotating part moves. The tachometer then processes this information and triggers an alarm if the speed exceeds or falls below preset limits. This functionality is crucial for maintaining operational safety and efficiency, as it allows for immediate corrective actions to be taken in response to speed anomalies.
Applications
Audible/Visual Alarm Tachometers are commonly used in industrial settings where machinery speed monitoring is critical. Specific examples include:
- Monitoring the speed of conveyor belts in manufacturing plants to prevent jams or overloading.
- Ensuring the correct operation of fans and blowers in HVAC systems by alerting operators to speed deviations.
- Providing speed feedback in automotive testing environments to ensure engines and components are operating within safe limits.
Advantages over other Tachometers
One of the primary advantages of Audible/Visual Alarm Tachometers over standard tachometers is their ability to provide immediate alerts through both sound and visual signals. This dual-alert system ensures that operators are promptly informed of any speed issues, reducing the risk of equipment damage or failure. Additionally, these tachometers can be more effective in noisy environments where visual alerts are necessary to complement audible signals.
Limitations
A limitation of Audible/Visual Alarm Tachometers is that they may require more complex installation and calibration compared to simpler tachometers. The need for precise sensor alignment and configuration of alarm thresholds can increase setup time and complexity. Additionally, in environments with high ambient noise or visual clutter, the effectiveness of the alarms may be reduced.
Considerations
When selecting an Audible/Visual Alarm Tachometer, several factors should be considered:
- Initial Costs: These devices may have higher upfront costs due to their advanced features and dual-alert capabilities.
- Operating Expense: Power consumption for both audible and visual alarms should be evaluated, especially in battery-operated systems.
- Durability: The device should be robust enough to withstand the operational environment, including exposure to dust, moisture, and temperature variations.
- Accuracy: Ensure the tachometer provides the required accuracy for the specific application, as inaccuracies can lead to false alarms or missed alerts.
- Replacement and Maintenance Costs: Consider the ease of replacing sensors or alarm components and the availability of spare parts to minimize downtime and maintenance expenses.
from Monarch Instrument
Features. All models - Universal Input, non-contact operation from optical, infrared, laser, proximity, and magnetic sensors or direct TTL and 3.3 to 50 Vac signals. ACT-1B Panel Tachometer. Economically priced. 1/8 DIN sized. 5 Digit LED display. 5 to 99,999 RPM range. Universal sensor inputs. [See More]
- Features: Audible / Visual Alarm; Battery Powered
- Accuracy: 1
- Operating Speed: 5 to 99999
- Tachometer Type: Indicator Only
from Global Digital Instruments LLC
STS-5000 – Tachometer only that accurately displays up to 20,000 RPMs. Features programmable firing pattern for 1:1, 2:1, or 1:2 firing patterns. Max RPM recall stores the highest RPM registered until cleared by the user. Works on 1 and 2 cylinder applications. FS-500 – All the features... [See More]
- Features: Audible / Visual Alarm; Counter/Totalizer; Timer
- Tachometer Type: Instrument / Sensor Package
- Operating Speed: 20000
- Sensor Technology: Contact Type (Roller)
from AI-TEK Instruments, LLC
The TACHTROL 10 computing tachometer is the same as the TACHTROL 30 but excludes the solid state relays, analog output and the utility RS485 function. [See More]
- Features: Application Software (optional feature); Audible / Visual Alarm; Counter/Totalizer (optional feature); Data Logger (optional feature); Timer
- Sensor Technology: Non Contact (Magnetic)
- Tachometer Type: Instrument / Sensor Package
- Form Factor: Panel
from Fluidwell bv
The F093 is a local indicator to monitor the tachometer engine speed with running hours simultaneously. The running hours can be reset to zero by pressing the CLEAR button twice. The eleven digit accumulated running hours however can not be reset to zero. Advantages. Robust IP66, IP67 (NEMA4X) field... [See More]
- Features: Audible / Visual Alarm; Battery Powered; Counter/Totalizer
- Form Factor: Panel; Field Mount / Stand Alone
- Tachometer Type: Indicator Only
- Display Type: Digital Numerical Display
from OMEGA Engineering, Inc.
The OMDC-DM8000 is an economical microprocessor-based digital tachometer system capable of measuring shaft speeds lower than 1 RPM. With an on-board microcomputer coupled with sophisticated internal software and a quartz crystal controlled reference frequency, the OMDC-DM8000 is able to maintain... [See More]
- Features: Audible / Visual Alarm; Counter/Totalizer; Timer
- Sensor Technology: Non Contact (Magnetic)
- Tachometer Type: Instrument / Sensor Package
- Form Factor: Benchtop
from Dart Controls, Inc.
An economical microprocessor-based digital tachometer system capable of measuring shaft speeds lower than 1 RPM. An on-board microcomputer coupled with sophisticated internal software, quartz crystal controlled reference frequency, and display up dating on every pulse or every .5 seconds (whichever... [See More]
- Features: Audible / Visual Alarm; Linear Speed / Length Measurement; Timer
- Accuracy: 0.0100
- Operating Speed: 1 to 125000
- Tachometer Type: Indicator Only