Measuring amplifier comparison

ME-Meßsysteme GmbH offers a very large selection of measuring amplifiers. The various series GSV-1, GSV-2 ... differ in the technology used (eg "purely analog", "16-bit", "24-bit", "multi-channel" ...) and in the available variants (DIN rail housing, IP67 aluminum housing, display, USB, CANbus, RS232, voltage output, current output, ...)

Long term availability guarantee

Most of the products are available for decades: The GSV-1 series is unique in its combination of features ("pure analogue measurement chain", "automatic zero adjustment via control line", "high dynamics", "low noise amplitude") and thus integrated in many series applications worldwide The decades we provide for "backward compatibility", rely on branded products in processors and electronic components, so that a "GSV-1" or "GSV-2" is still the leader today.

GSV, what does that mean?

DC amplifier (for sensors with strain gauges).

We rely on DC measurement amplifiers as opposed to carrier frequency amplifiers because of the higher dynamics (i.e., the higher frequency bandwidth), simpler design, less cable movement, and lower cost. Especially with miniature sensors, changes in inductance and capacitance in the leads may be a problem when using frequency or pulse exciting amplifiers. Special cables with multiple shielding are not always suitable for industrial use.

Zero signal stability and in particular the noise amplitude we achieve by selecting the components in the same quality as a carrier frequency amplifier.

GSV-xx, which amplifier can do what?

in a maximum of 4 sentences ... without formulas, without numbers

GSV-1

The GSV-1 series features fully analogue signal processing. This allows high bandwidths of 250Hz, 2.5kHz or 10kHz. There are one-channel versions available as a printed circuit board (GSV-1L), in a top-hat rail housing (GSV-1H), in an aluminum housing (GSV-1A), and multi-channel designs in an aluminum housing (GSV-1A4, GSV-1A8). Due to the output ± 10V can be used for pressure and tension measurements and 3-axis force sensors.

GSV-2

The GSV-2 series with "24-bit Sigma-Delta" technology was primarily developed for use over RS232, USB, CANbus, display and SD card as a single-channel measuring amplifier. In addition, a "true" analog output from the GSV-1 technique is available, e.g. for monitoring purposes. The two thresholds can only be configured via software or via a keyboard menu (for GSV-2FSD-DI, GSV-2TSD-DI). 

The different housing designs are suitable for various applications, such as e.g. IP67 aluminum for field use, GSV-2TSD-DI for laboratory use or GSV-2MSD-DI for the robust outdoor use of the service technician.

GSV-3

The GSV-3 series was developed with 16-bit technology, preferably for use with USB port (GSV-3USB, GSV-3USBx2), without external power supply, with galvanic isolation, in a handy metal housing for the back pocket, as 1- or 2-channel device. It contains the technology of the GSV-1L for the zero adjustment before the A/D converter, so that the 16Bit are also used to 100%, despite 100% reserve for the zero balance. Due to the small size of the "basic module" GSV-3LS, the measuring amplifier is also suitable for integration into serial products and for special tasks, such as Wireless measured value transmission with Bluetooth known (GSV-3BT) or for a variant with CANbus (GSV-3CAN).

GSV-4

The GSV-4 series has 4 channels in 24-bit sigma-delta technology, although only 16 bits per channel can be accommodated in the data frame. This benefits a high data throughput of up to 4x500 S/s via USB interface (GSV-4USB) or via UART interface with further processing via Bluetooth (GSV-4BT). Unlike GSV-1, GSV-2 and GSV-3, the GSV-4 already has configurable inputs for various sensors, such as strain gage sensors (quarter-half full bridge), active voltage input for potentiometric displacement sensors or other active sensors, as well as for temperature sensor PT1000 and thermocouple type K.

GSV-6

The base unit GSV-6CPU of this series can process up to 6 measuring channels in 16 bit "Sigma Delta technology". In addition to fully configurable, TEDS-capable 1-channel devices with analog output GSV-6L and GSV-6K is also the smallest 6-channel "laboratory amplifier" GSV-6BT with data logger function, configurable inputs and Bluetooth Low Energy with GATT protocols and Bluetooth Classic built with SPP protocol with GSV-6CPU.

Extensive software support and complete documentation of the protocols are a matter of course (as with all measurement amplifiers of ME measuring systems).

GSV-8

The GSV-8 series of 8-channel measuring amplifiers with freely configurable inputs is equipped as standard with a USB port and fully configurable analogue outputs. The TEDS-capable device (read and write) is available with various fieldbuses (CANbus and EtherCat, Ethernet, Wifi) in two housing versions: Screw terminals in IP67 aluminum housing (GSV-8AS) and D-Sub connectors in aluminum desktop housing (GSV- 8DS). The GSV-8 series is characterized by simultaneous sampling at 8x48 kS / s and an unprecedented resolution.

GSV-11

The GSV-11H series is a low-cost version of the GSV-1H with limited functionality: bandwidth only 20Hz, voltage output only 0 ... 10V instead of -10V ... + 10V. Due to the unidirectional analog output 0 ... 10V only suitable for pressure OR for tension measurement. Not recommended for use with 3-axis sensors.

GSV-13

Due to its round design, the measuring amplifier GSV-13 is suitable for integration in measuring bolts and shear bar load cells. The supply voltage is 24V DC. The equalization of gain and zero signal occurs by substitution of fixed resistors 0805 (and not independently) and requires expert knowledge in the strain gauge technique and in the alignment of the Wheatstone bridge circuit. Therefore, it is strongly recommended to use the GSV-6L with automatic zeroing and automatic scaling function.

GSV-14

The GSV-14 has been developed for use in battery or battery powered devices with an operating voltage of 3.4V or higher. As with the measuring amplifier GSV-13, zero adjustment and adjustment of the gain are performed by replacing fixed resistors (and not independently of each other). It is therefore strongly recommended to use the measuring amplifier GSV-6CPU, which works with supply voltages in the range of 3.6V to 5.5V.

GSV-15

The GSV-15L PCB of the GSV-15 series with a fully configurable analog output (zeroing function and scaling function) is particularly suitable for integration into strain gage force sensors.

The bandwidth is fixed at 315 S/s. There is also a top hat rail mount model (GSV-15HSW) with two thresholds and a model with 4 screw terminals for parallel connection of up to 4 load cells in a terminal box IP67 (GSV-15KL4) with integrated GSV-15L.

Protocols and software

For all measuring amplifiers with interface, the application software GSVmulti is available for configuration and measurement data acquisition. The data logs are fully documented. Programming includes Windows DLL and Labview VIs for creating your own software.