BL550 Set-Point Alarm Relay | Input 0(4) … 20 mA or 0…10V | Output changeover relay contact
Product number:
BL550
Description
BL550 Set-Point Alarm Relay | Input 0(4) … 20 mA or 0…10V | Output changeover relay contact
This extremely compact set-point alarm relay with changeover output contacts monitors and controls process variables with maximum reliability.
- Simple monitoring and control of standard signals
- NC/NO changeover
- Limit values / switching thresholds freely adjustable using potentiometer on the front
- Input signal, switching hysteresis and delay adjustable using DIP switches
- 3-way isolation
- Minimum space consumption in the enclosure: 6-mm housing
- CE compliant and UL approved
- 3-year warranty
- Perfect price-performance ratio
We look forward to hearing from you!
Contact Us
| Function: | Monitoring of standard signal threshold value |
|---|---|
| Product Category: | Isolated Signal Conditioner |
Our service
Relevant Blog Posts
Mar 2025
Process Analytics
SE605H Conductivity Sensor with CondCheck
The SE605H conductivity sensor with CondCheck enables USP 645 verification without interrupting the measuring chain.
Jul 2024
Process Analytics
ACHEMA 2024 - Review and Impressions
A brief cinematic retrospective of our trade fair booth, Knick’s international team, and a successful booth party.
Feb 2024
Process Analytics
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
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
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
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
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
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
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
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
Process Analytics
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.
Apr 2022
Process Analytics
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
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
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.
Jan 2022
Process Analytics
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
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
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 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.
May 2021
Process Analytics
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
Process Analytics
New SE656N digital conductivity sensor
New toroidal Digital Conductivity Sensor with a large measuring range and consisting of PFA for using in aggressive media
Mar 2021
Process Analytics
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.
Jul 2020
Process Analytics
High-quality immersion fitting for mobile applications
ARD 170 enables measurements even in deep water
Jul 2020
Process Analytics
Modular immersion fitting as an electrically conductive variant
Knick is expanding its portfolio of fittings for liquid analysis with additional electrically conductive (EL) variants.
Apr 2020
Process Analytics
New multiparameter transmitter Stratos Multi
Knick is launching the the next generation in its Stratos analyzer product line.
Feb 2018
Process Analytics
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.
Apr 2017
Process Analytics
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.
Feb 2017
Process Analytics
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.
Nov 2016
Process Analytics
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.