Amplifiers & indicators

What are the advantages of our measuring amplifiers?

• Precise and low-noise operation
• High resolution and excellent dynamic properties
  
• Different form factors
  
• Configurable to suit your applications
  
• Measurement amplifiers and digital displays with BUS interfaces
  
• Analog and digital models available
  
• Different mounting options (rail mounting, rack inserts, desktop housing)
  
• Digital displays for analog standard signals, some with integrated strain gauge amplifiers

Possible applications for measuring amplifiers

• System control (roller distance monitoring, parts classification, etc.)
• Process monitoring
  
• Weighing technology / scales
  
• Measurement technology (testbeds etc.)
  
• Laboratory applications / laboratory equipment
  
• Vibration monitoring
  
• Signal amplification for transmission over long distances

Measuring amplifiers for any type of sensor

Our portfolio for measurement amplifiers covers the majority of electrical measurement technology for physical parameters. These sensors include inductive, potentiometric, capacitive, and piezoelectric sensors, as well as sensors and transducers based on strain gauge technology.

Strain gauge sensors

Our SG series measurement amplifiers are made for sensors based on strain gauge technology. These amplifiers are available in four designs:

• SG-KP and measurement amplifiers with BUS interfaces for DIN rail mounting, for instance in control cabinets.
  
• The SG-IP has a rugged aluminum housing with at least IP65 protection for demanding industrial applications.
• Our SG-KA models are designed for mounting in 19” racks. We also offer a portable measurement amplifier for mobile use in a desktop housing with digital display: the SG-TG.

LVDT and RVDT

Our MC type measurement amplifiers are designed for use with inductive displacement sensors and feelers (differential transformers or LVDT) and angular position sensors (RVDT). As with the SG series amplifiers, there are several available form factors: DIN rail mounting units, rugged aluminum cases, and 19” rack mounting units. These amplifiers act as signal generators for the sensors, as well as evaluating the return signal.

A special version for force/displacement measurement combines SG and MC amplifiers to form a two-channel system. For piezoelectric sensors, we offer the VIB-KS models for use in control cabinets and the VIB-IP models for wall-mounting in challenging environments.

Signals and voltages

All measurement amplifiers are available as standard models with analogue output. You can choose from a broad selection of standard voltage and current signals with operating voltages between 10–18 VDC and 18–30 VDC.

Customization

Althen measurement amplifiers can be easily modified to suit your specific measurement needs. Customization options include multi-channel variants, integrated digital displays, switchable measurement points, and limit contacts.

Tell us about your requirements, and together we will find the ideal solution for your application. Of course, our advice is free of charge.

Measuring amplifiers for every application: what sets us apart

We have the right measuring amplifier for every application. We are happy to support you in your selection. At Althen, we draw on more than 45 years of experience to offer you the optimum solution, customised to your requirements. This also includes customised measuring amplifiers and displays as well as suitable sensors as a complete package. Do you have any questions? We are here to help you!

How does a measuring amplifier work?

A measuring amplifier is an electronic device that is used to amplify weak electrical signals in order to make them usable for further processing or measurements. A typical structure can be as follows:

• Input stage: The input stage of the measuring amplifier typically consists of a differential amplifier or an instrumentation amplifier. This stage is responsible for capturing the input signal and converting it into a stable, low noise level.
• Amplification stage: The amplification stage is the heart of the measuring amplifier. This is where the input signal is amplified. The gain can be adjustable to cope with different signal levels without compromising accuracy.
• Filter: In some measuring amplifiers, filters are used to remove unwanted noise or high-frequency interference. These filters can be low-pass, high-pass or band-pass filters, depending on the requirements of the application.
• Output stage: The output stage of the measuring amplifier converts the amplified signal into a form suitable for further processing or measurement. This can be an analogue voltage or a current that is passed on to other devices or instruments.
• Linearity and accuracy: Measuring amplifiers must have high linearity and accuracy to ensure accurate measurements. This means that the ratio between the input and output signal remains constant over a wide range and that the amplifier's gain is accurately calibrated.

Overall, a measurement amplifier works by amplifying weak electrical signals to make them usable for further processing or measurements, with particular attention paid to accuracy and linearity.