Go to homepage
Show all categories Products Back

A20220 Strain Gauge Transmitter | Space-saving 6 mm Enclosure

Product number: A20220
Description Technical details Downloads Use cases Blog posts

Description

A20220 Strain Gauge Transmitter | Space-saving 6 mm Enclosure

The transmitter for strain gauge full bridges in a 6 mm housing.

  • Universal usability
    for strain gauges, pressure and load cells, and other resistive measuring bridges
  • Intuitive configuration
    of basic parameters – easy, without tools, using 4 rotary and 8 DIP switches
  • Calibrated range selection
    without complicated trimming
  • Convenient adjustment
    Zero point and sensitivity are directly adjusted “at the push of a button“ using the teach-in function
  • Protective separation
    according to EN 61140 – protection of the maintenance staff and downstream devices against excessively high voltages up to 300 V AC/DC
  • High accuracy
    with innovative switching concept
  • Minimum space requirement
    in the enclosure – only 6 mm wide modular housing – more transmit-ters per meter of mounting rail
  • Low-cost assembly
    quick mounting, convenient, connection of power supply via DIN rail bus connectors
  • 5-year warranty

The Task
In many different industrial applications strain gauges are used to continuously measure mechanical quantities such as force/weight or deflection/torsion. In many cases they are used as a reference input for monitoring systems, safety shutdown systems, or for similar critical tasks. As a rule, high demands are placed on function, accuracy, flexibility and electrical safety. Strain gauges are highly sensitive resistors which react to mechanical stress with a slight change in resistance. These changes can be detected by a bridge circuit. The most common circuit design is the full bridge. In force transducers and load cells, the strain gauges are already mechanically applied in full bridge circuits. These sensors provide a raw signal which is prepared and standardized for further processing using a strain gauge transmitter. 

The Problem
Customary strain gauge sensors have individual characteristics, which requires tedious and timeconsuming adjustment of the respective strain gauge transmitter using potentiometers. Furthermore, strain gage transmitters up to now had a very wide modular housing and therefore occupied a large amount of space in the enclosure. For world-wide applications, several versions with different supply voltages were often used.

The Solution
The universal A20220 strain gauge transmitters provide connection possibilities for all standard strain gauge force transducers and strain gauge load cells in full bridge configuration. They can be flexibly adapted to the respective measuring task using DIP and rotary encoder switches or via a “teach-in function“. 3-port isolation with protective separation up to 300 V AC/DC according to EN 61140 ensures optimum protection of personnel and equipment as well as unaltered transmission of measuring signals. The A20220 offer maximum performance in the smallest of spaces. Adjusting the zero point and sensitivity to the individual strain gauge sensor is particularly convenient using the “teach-in func-tion“ – just at the push of a button at the device front. Sensors with known characteristics can be very easily calibrated using four rotary encoder switches and eight DIP switches. Special measuring tasks can be solved with devices which Knick configures according to individual specifications. Fixed-range devices without switch are used, for example, when manipulations or mix-ups must be precluded.

We look forward to hearing from you!
Contact Us

Technical details

Function: Measurement of weight, strain
Output: 0 ... (±)5 V, 0 ... 10 V, 0 ... 20 mA, 4 ... 20 mA
Isolation AC/DC: up to 300 V
Test Voltage: 2.5 kV AC
Power Supply: 24 V DC
Ambient operating temperature: 0 … 55 (65) °C
Dimensions (W x L x H): 6.2 x 93 x 101 mm
Special features: For safety circuits up to SIL 3, Rotary and DIP switches for easy, intuitive configuration, Transmitter for load cells and strain gauges (full bridges) in a 6 mm housing

Downloads

Manuals

[264] User Manual (DE, EN, FR)
A 20220P0/ Strain Gauge Transmitter
Version 02
[13390] User Manual (DE, EN, FR, ES)
ZU 0677 (Power terminal block)
Version 03
[10690] User Manual
A20220P0-0002 Strain Gauge Transmitter
Version 01

Brochures

[14160] Brochure
Product Overview Interface Technology

Data Sheets

[255] Data sheet
A20220 Strain Gauge Transmiter
Product Description | Specifications | Product Range

Certificates

[11256] CB Test Certificate
No. DE 2-036775 | 2022-10-11
P32000, P32100, P32200, P32300, A20210, A20220, A20230
[11418] Certificate of Compliance (UL)
No. 20181015-E220033 | 2018-OCTOBER-15
POWER CIRCUIT AND MOTOR-MOUNTED APPARATUS
P32*00P0/**, A202*0P0..., BL520
[13789] EU Declaration of Conformity (DE, EN, FR)
A20210P0, P32100P0, A20220P0, P32200P0, A20230P0, P32300P0, P32000P0
No. EU231123A | 2023-11-23

Software

[12154] Software (.zip)
ePLAN P8 Produktmakros
[11876] Knick Produktmakros (.pdf)
ePLAN Electric P8

Our service

Used in Process or Applications

Interface Technology
High voltage transducers and signal conditioners for the acquisition and conversion of current, voltage, temperature, speed, strain and resistance signals.
Products
High voltage transducers featuring long-term stability, transducers, and signal multipliers for advanced applications

Related Products

A20210 Sensor Transmitter | Input resistance thermometers, thermocouples, resistors and shunt voltages up to ±1000 mV
A20210 Sensor Transmitter | Input resistance thermometers, thermocouples, resistors and shunt voltages up to ±1000 mV
Product number:

A20210

A20220 Strain Gauge Transmitter | Space-saving 6 mm Enclosure
A20220 Strain Gauge Transmitter | Space-saving 6 mm Enclosure
Product number:

A20220

A20230 Sensor Transmitter | Input potentiometers and resistors
A20230 Sensor Transmitter | Input potentiometers and resistors
Product number:

A20230

BL520 Sensor Transmitter | Input Pt100/Pt1000 resistance thermometer (RTD) and thermocouples | Isolation up to 300 V
BL520 Sensor Transmitter | Input Pt100/Pt1000 resistance thermometer (RTD) and thermocouples | Isolation up to 300 V
Product number:

BL520

P16000 Pulse Frequency Conditioner | Input speed sensor signal up to 20kHz | Safe decoupling acc. SIL3
P16000 Pulse Frequency Conditioner | Input speed sensor signal up to 20kHz | Safe decoupling acc. SIL3
Product number:

P16000

P16800 Speed Signal Doubler | Input speed sensor signal 10 … 33.6 V DC (max.35 V) | Safe decoupling acc. SIL4, safe transmission acc. SIL2
P16800 Speed Signal Doubler | Input speed sensor signal 10 … 33.6 V DC (max.35 V) | Safe decoupling acc. SIL4, safe transmission acc. SIL2
Product number:

P16800

P32000 Sensor Transmitter | Input wide selection of sensors | Universal measurements | Configuration interface for PC
P32000 Sensor Transmitter | Input wide selection of sensors | Universal measurements | Configuration interface for PC
Product number:

P32000

P32100 Sensor Transmitter | Input RTDs and thermocouples | For safety circuits up to SIL3 | Configuration interface for PC
P32100 Sensor Transmitter | Input RTDs and thermocouples | For safety circuits up to SIL3 | Configuration interface for PC
Product number:

P32100

P32200 Sensor Transmitter | Input strain gauges and load cells | For safety circuits up to SIL3 | Configuration interface for PC
P32200 Sensor Transmitter | Input strain gauges and load cells | For safety circuits up to SIL3 | Configuration interface for PC
Product number:

P32200

P32300 Resistance Transmitter | SIL 2 / SIL 3 Functional Safety
P32300 Resistance Transmitter | SIL 2 / SIL 3 Functional Safety
Product number:

P32300

Relevant Blog Posts

Sept 2024

Interface Technology

Hydrogen

Stack and String Voltage Measurement in Electrolyzers and Fuel Cells
Voltage, current and temperature measurement in electrolyzers with P40000 series high voltage transducers

Sept 2024

Interface Technology

New 30 mV Shunt Resistors for Knick Transducers

Knick is expanding the accessory range for its high-voltage transducers with immediate effect by adding shunt resistors with a 30 mV voltage drop
Innovations at InnoTrans 2024

Sept 2024

Interface Technology

Exhibition, InnoTrans

Innovations at InnoTrans 2024 for rolling stock and DC traction power supply
At InnoTrans 2024 Knick presents electrical measurement solutions for rolling stock and DC traction power supply applications
 

Jul 2024

Process Analytics

ACHEMA 2024 - Review and Impressions
Review ACHEMA 2024

Feb 2024

Process Analytics

Uniclean700, Launch

Uniclean 700 Series - Modular control system for automated sensor cleaning
With the Uniclean 700 series, Knick is introducing a modular control system, that can be installed very quickly and cost-effectively as a flexible entry-level solution for automated sensor cleaning.

Dec 2023

Company

|

Interface Technology

|

Process Analytics

Knick Austria - direct customer contact in Austria from 2024
Reorganization of sales in Austria and new contacts in the field of process analytics and interface technology

Apr 2023

Process Analytics

Launch, Fitting, WA111

Robust WA111 Retractable Fitting Made of Plastic for Highly Corrosive Operating Conditions
The plastic WA111 retractable fitting is a robust and cost-effective solution for corrosive processes and environments. It is equipped with a secure lock function and multiple nozzles for thorough sensor cleaning.

Apr 2023

Process Analytics

Launch, Fitting, WA155

Successful joint project : Knick developed the special Ceramat WA 155 retractable fitting for optical probes from SOPAT
In cooperation with SOPAT, Knick developed a special Ceramat fitting for optical probes for automatic cleaning in fouling processes.

Apr 2023

Process Analytics

Conductivity, Phamacy, pH

pH and conductivity measurement in vaccine production
Pharmaceutical contract manufacturer relies on Knick's transmitters for modular production plants for Covid-19 vaccines.

Apr 2023

Process Analytics

Conductivity, Sensor, SE625

Sturdy 2-Electrodes Conductivity Sensor SE625 with Coaxial Electrodes made of Titanium
The SE625 ensures reliable and accurate determination of the conductivity of ultrapure water in the semiconductor industry.

Jan 2023

Process Analytics

ARD75

Sensor Adapter with Lock Function Enables Safe and Thorough Cleaning
Sensor adapter with locking gate for safety and thorough cleaning of sensors in the immersion fitting ARD75 without the need

Nov 2022

Process Analytics

Protos II 4400, Module

Up to six Sensors on one Transmitter Protos II 4400 via Modul MSU4400-180
Users can now connect up to six Memosens sensors simultaneously.

Aug 2022

Process Analytics

Exhibition, Achema

ACHEMA 2022 - Knick at the world forum for the process industry
In August 2022, the international process industry met at the ACHEMA. Knick presented the cCare system and industrial applications in a new concept.

Jun 2022

Company

Sport

Five times five times five results in running fun with team spirit and beaming photo smile
Knick participated in a Berlin running event with 25 people.

Jun 2022

Process Analytics

pH, Sensor, SE555, ORP

Combined pH- and ORP-Sensor SE555X/*-AMSN
Combined pH and ORP measurement in one sensor SE555 saves place and equipment costs for demanding requirements in the chemical industry, the food sector and for hygienic applications.

May 2022

Interface Technology

Energy

Energy storage - the handshake between renewable energy and electric vehicles
Energy storage technology such as battery and hydrogen are critical for growth and continuous development of renewable energy and e-mobility.

Apr 2022

Process Analytics

MemoTrans

Ultra Compact Transmitter for Memosens Sensors
The new ultra compact MemoTrans MT201 transmitter plugs directly onto the Memosens sensor in the fitting and communicates via 4-20 mA HART protocol.

Feb 2022

Process Analytics

Protos II 4400, Stratos Multi, Software, ProgaLog

Conveniently configure transmitters offline on a PC - ProgaLog 4000
Conveniently configure all flexibly configurable Stratos Multi and Protos II 4400 transmitters offline, save settings, duplicate for further transmitters, and create documentation for audits.

Feb 2022

Process Analytics

Stratos Multi, Transmitter

New Stratos Multi E461N transmitter with Profinet
The interface enables continuous communication of process variables and predictive maintenance from the field level to all common process control systems.

Feb 2022

Interface Technology

P52000VPD, Voltage

P52000VPD voltage presence detector reliably detects voltages up to 4200 V DC
The new P52000VPD voltage presence detector reliably monitors areas with high voltages and sends a signal to the downstream plant control system when a specified threshold value is reached.

Jan 2022

Process Analytics

Memosens

Memosens 2.0: Evolution of digital data transfer
As one of the two initiators of Memosens, Knick is constantly developing the technology.

Nov 2021

Process Analytics

Conductivity, Sensor, Ex, SE656, SE655

SE655X Digital and SE656X Digital - Digital Conductivity Sensors with Ex Certification
The SE655X digital and SE656X digital conductivity sensors with Memosens protocol are now also available with Ex certification.

Nov 2021

Process Analytics

Exhibition, Switzerland, Ilmac

ILMAC 2021 in Basel - Trade Show Review by Knick Schweiz AG
Knick Schweiz AG exhibited at ILMAC in Basel and gives a brief review of what it's like to have finally met customers at the show again.

Oct 2021

Process Analytics

Stratos Multi, Transmitter, Ex

Stratos Multi E401X- Multiparameter Transmitter for Hazardous Locations
The new Multiparameter Transmitter Stratos Multi E401X can now also be used in hazardous locations, installed in Ex Zone 2.

Sept 2021

Interface Technology

USA, Exhibition

Knick Interface at Battery and Electric & Hybrid Vehicle Technology Expo
Knick will be showcasing high-voltage electrical measurement and signal conversion products.

May 2021

Process Analytics

Transmitters, Stratos Multi

Stratos Multi E471 with EtherNet/IP for process optimization
EtherNet/IP communication protocol allows the transmitter to be easily integrated into Industrial Ethernet networks as PCS.

May 2021

Interface Technology

Quadruple Standard Signals in Just One Signal Conditioner
The A20340 can output a standard input signal to four calibrated and galvanically isolated outputs in parallel.

May 2021

Process Analytics

Launch, Conductivity, Sensor, SE656

New SE656N digital conductivity sensor
New toroidal Digital Conductivity Sensor with a large measuring range and consisting of PFA for using in aggressive media

Apr 2021

Interface Technology

Hydrogen

Electrical measurement and process analytics for hydrogen production
Knick products optimize hydrogen production in the process and in electrolyser operation.

Mar 2021

Process Analytics

Protos II 4400, Profinet

Transmitter for the process industry with PROFINET module
The PROFINET industrial Ethernet standard is becoming an increasingly important aspect of process engineering in the “Industry 4.0” environment.

Mar 2021

Interface Technology

High-Voltage Transducer, USA, P44000

Condition Monitoring of High-Voltage Motors
Having an active predictive maintenance campaign in place for large rotating equipment can be a key strategy for maximizing process uptime.

Mar 2021

Interface Technology

Pulse frequency conditioner for speed sensors
The new P16000 from Knick is a pulse frequency conditioner that converts frequency signals from speed sensors into standard signals.

Nov 2020

Company

Switzerland

Knick Schweiz AG takes over Interface sales for Swiss customer
The Interface product group includes transmitters and transducers for demanding industrial applications.

Nov 2020

Interface Technology

High-Voltage Transducer, Voltage, P42000D2

Worldwide smallest transducer up to ±2200 V
The P40000 series from Knick enables reliable voltage measurements from ±50 mV to ±3600 V and current measurements from ±100 mA to ±20 kA.

Aug 2020

Interface Technology

DC

Importance of broad-range power supplies for DC electrical measurement
Many DC electrical measurement products manufactured by Knick contain universal, also known as broad-range, power supplies.

Jul 2020

Interface Technology

High-Voltage Transducer, DC, P29000

Measuring Photovoltaic Degradation
Photovoltaic (PV) array degradation is an important aspect to consider for system design and installation.

Jul 2020

Process Analytics

Launch, Fitting, ARD170

High-quality immersion fitting for mobile applications
ARD 170 enables measurements even in deep water

Jul 2020

Process Analytics

Fitting, ARD50, ARD75

Modular immersion fitting as an electrically conductive variant
Knick is expanding its portfolio of fittings for liquid analysis with additional electrically conductive (EL) variants.

Jun 2020

Interface Technology

High-Voltage Transducer, USA

Electrical Measurement Solutions: Control from 480 to 4800 Volts
Voltage and current transducers from Knick bring true control to electrical measurement applications across a wide-range of industries.

Jun 2020

Interface Technology

High-Voltage Transducer

Benefits of High Voltage Transducers versus Instrument Transformers
When a need arises to step voltage in a circuit either up or down for purposes of power transmission or distribution, there is no doubt that transformers are essential.

Apr 2020

Process Analytics

Launch, Transmitters, Stratos Multi

New multiparameter transmitter Stratos Multi
Knick is launching the the next generation in its Stratos analyzer product line.

Mar 2020

Company

Switzerland

Knick founds Swiss subsidiary
As a further milestone in strengthening international markets, Knick Elektronische Messgeräte GmbH & Co. KG founded the subsidiary Knick Schweiz AG.

Dec 2019

Company

Knick in Review: Our Highlights of 2019
Here at Knick, 2019 has been year full of changes.

Nov 2019

Interface Technology

DC, USA, Current

Shunt Resistor versus Hall Effect Technology
There are many systems where measurement of large DC currents are needed for performance and safety.

Dec 2018

Company

This was our 2018: A Review
We look back and remember the most important events of the past 12 months.

Mar 2018

Interface Technology

MTBF beyond 3000 years: A snap hook for your plant
Failure of equipment on the plant floor can lead to considerable and costly disruption.

Feb 2018

Process Analytics

Fitting, Sensor

How to get the sensor into the process
Sensors as the direct interface to the process must be exactly matched to the chemistry of the measured medium and to the prevailing pressure and temperature conditions.

Jan 2018

Interface Technology

UL

Knick Products Comply With UL - What Does That Mean?
There are different assessments and approaches to reach an adequate level of safety. Manufacturers are typically on the “safe” side, if they comply with recognized standards.

Nov 2017

Interface Technology

High-Voltage Transducer, P50000

High-voltage transducer offers more safety on railway vehicles
The requirements placed on railway vehicles have increased significantly in recent years. Products for rolling stock need to ensure a higher level of functional safety than ever before.

Jun 2017

Company

Sport

18th “Berliner Wasserbetriebe5x5 km Team Relay” from June 14–16, 2017
Full efforts for the team, followed by fun. This was the motto of the team relay, which took place on three evenings in the Berlin's Tiergarten park.

Apr 2017

Company

Sales Engineer at a Medium-Sized Company
Florian Koppe works as a Sales Engineer at Knick and tells us why he chose Knick and what his working day looks like.

Apr 2017

Process Analytics

MemoRail Modbus

Powerful compact analyzer boosts performance while reducing costs
It has long been common practice when taking pH/ORP, conductivity, and oxygen measurements that a fixed analyzer be mounted near the sensor. The analyzer serves several purposes.

Apr 2017

Company

USA

Knick opens a new subsidiary to service North America
Knick Interface LLC will focus on delivering solutions for demanding applications, such as are found in railway and nuclear power industries.

Feb 2017

Interface Technology

P41000TRMS

True RMS Measurement with P41000TRMS
Traditional millivolt AC transducers are very susceptible to errors due to their poor insulation and are only designed for pure sinewave measurement.

Feb 2017

Process Analytics

Conductivity

High-Precision Conductivity Measurement at Extreme Temperature Differences
Pharmaceutical manufacturer, EVER Pharma Jena uses the extremely robust conductivity sensors SE605(H) and SE680 with Memosens technology from Knick.

Feb 2017

Interface Technology

P22400, SIL

Functional safety and maximum availability can go together
The requirements on operational and safety-related circuits are continuously growing.

Nov 2016

Process Analytics

Transmitter, FF, Profibus, HART

The Big Three of the Process Industry: HART, FF, Profibus
Our Knick multi-parameter analyzers are now available with Profibus and FF interfaces. Even for hazardous areas.