Relay Output Data Loggers and Data Recorders
Last Updated: November 6, 2024 Reviewed by: Jon Lowy, consulting engineer
Description
Relay output data loggers and data recorders are specialized data acquisition instruments designed to capture and store data from various sensors and inputs. These devices are equipped with relay outputs, which allow them to control external devices or systems based on the data they collect. They are commonly used to monitor physical parameters such as temperature, pressure, humidity, and more, converting these measurements into digital formats for storage or transmission to a host computer.
Working Principle
The working principle of relay output data loggers and data recorders involves capturing data from connected sensors, converting this data into a digital format, and storing it in internal memory or transmitting it to a host system. The relay outputs are used to trigger actions based on predefined conditions. For example, if a temperature exceeds a certain threshold, the relay can activate a cooling system. These devices often feature multiple input channels, allowing them to monitor various parameters simultaneously. They may also include communication ports such as Modbus, Ethernet, or WiFi for real-time data transfer and remote monitoring.
Applications
Relay output data loggers and data recorders are used in a wide range of applications. In industrial settings, they are employed for process monitoring, temperature profiling, and fault identification. They are also used in research and development for climate chamber monitoring and test stands. Additionally, these devices are valuable in environmental monitoring, where they can track parameters like temperature and humidity to ensure conditions remain within specified limits.
Advantages over other Data Loggers and Data Recorders
One of the primary advantages of relay output data loggers and data recorders is their ability to control external devices based on the data they collect. This feature allows for automated responses to specific conditions, enhancing system efficiency and safety. These devices also offer high reliability and accuracy, reducing the need for manual measurements and freeing up labor for other tasks. Furthermore, their capability to interface with various communication protocols and sensors makes them highly versatile and adaptable to different applications.
Limitations
Despite their advantages, relay output data loggers and data recorders have some limitations. They may require specific modules to accommodate different types or numbers of inputs, which can increase the initial setup cost. Additionally, while they offer automated control features, the complexity of programming these actions can be a barrier for users without technical expertise. The upfront cost of these devices can also be higher compared to simpler data loggers that do not include relay outputs or advanced communication features.
Considerations
When selecting a relay output data logger or data recorder, it is essential to consider the specific requirements of your application. Factors such as the number and type of inputs, the need for real-time monitoring, and the desired communication protocols should be evaluated. Additionally, the ease of use and the availability of technical support and documentation can significantly impact the overall user experience. Ensuring that the device can meet the environmental conditions of the application, such as temperature ranges and humidity levels, is also crucial for reliable operation.
from ABB Measurement & Analytics
Users of the AWT440 benefit from plug-and-play connectivity, automatic sensor recognition and set-up. Enabling: – Automatic connection of up to 4 digital sensor. – Intuitive software with full colour graphical display. – Data logging and graphical process trending. – Full... [See More]
- Outputs: Relay Output
- Digital I/O Channels: 6
- Analog Channels: 4
- Form Factor: Panel / Chassis Mount
from Vaisala
For wireless monitoring of controlled areas. The RFL100 data loggers use Vaisala ’s proprietary VaiNet wireless technology to monitor environments ranging from warehouses, to production areas, to cleanrooms and laboratories. VaiNet wireless technology is based on the LoRa ® modulation... [See More]
- Outputs: Relay Output
- Sampling Frequency: 915
- Analog Channels: 1
- Accuracy: 1.5
from Sifam Tinsley UK
Features. • Data readout and recording from devices with RS485 interface and Modbus RTU protocol. • 2 x RS485 interface with Modbus RTU protocol (Master and Slave). • 3-colour display (14 mm height), programmable in 3 ranges of the displayed value. • 21-point individual... [See More]
- Outputs: Analog Current Output; Relay Output
- Form Factor: Rack Mount
- Analog Channels: 2
- Inputs: RS-485, MODBUS
from CAS DataLoggers
The Environmental Data Logger. The dataTaker DT82E is an intelligent data logger that was designed with environmental applications in mind. The DT82E is a robust, stand alone, low power data logger featuring USB memory stick support, 18 bit resolution, extensive communications capabilities and... [See More]
- Outputs: 3 with Open Drain FET (Max. 30V, 100mA), 1 with Logic Output; Relay Output
- Digital I/O Channels: 4
- Analog Channels: 6
- Sampling Frequency: 0.0250
from OMEGA Engineering, Inc.
The channels in the analog input part adopt insulated inputs, which means that temperature (thermocouple/resistance temperature detector) and voltage can be set differently for each channel. Eleven types of thermocouples, Pt100 and JPt100 temperature-measuring resistors, and a voltage up to 50V... [See More]
- Outputs: Relay Output
- Accuracy: 0.1000
- Analog Channels: 10
- Form Factor: Portable
from RainWise, Inc.
Data logger for receiving and processing meteorological measurment values. The TROPOS is available in 3 different varieties in order to provide maximum flexability. Data is transmitted to TROPOS through the sensors that are linked to it. This data is then stored on a compact flash card (CF) within... [See More]
- Outputs: Relay Output
- Application: Environmental
- Form Factor: DIN Rail
- User Interface: Front Panel; Computer Programmable
from Define Instruments
What it does: Enables sophisticated monitoring, control and data logging of up to 16 input signals from a variety of sources. Easy DAQ and onboard data logging. Get all your data acquisition (DAQ) requirements fulfilled with the Zen Datalogger. It logs data onto a 1GB micro SD card, so you can... [See More]
- Outputs: Analog Current Output; Relay Output
- Digital I/O Channels: 4
- Analog Channels: 16
- Resolution: 16
from Measurement Computing
Stand-alone, high-speed 100 kS/s, multifunction data logger; includes a 4 GB SD memory card, USB cable, and external power supply. KEY HIGHLIGHTS. The LGR-5320 Series of stand-alone, high-speed, multifunction data loggers provide analog input along with digital input, relay output, and four... [See More]
- Outputs: SD Mem. Card; Relay Output
- Digital I/O Channels: 16
- Analog Channels: 16
- Sampling Frequency: 100
from West Control Solutions
The DataVU 5 paperless recorder is designed to provide a fast and easy set up through user friendly controls. Set up is so simple that it can be carried out on the spot via the front panel without the need for a PC. Configuration is carried out using a combination of fixed keys and menu led soft... [See More]
- Outputs: Relay Output
- Digital I/O Channels: 4
- Analog Channels: 6
- Form Factor: Panel / Chassis Mount
from Iwaki America and Walchem, IWAKI America Inc
WebAlert ® was developed to meet the increasing demands for improved operational efficiencies and enhancements to service programs that can be gained by continuous monitoring of remote equipment and systems. WebAlert ® seamlessly web-enables your installed equipment, providing local and... [See More]
- Outputs: USB, Ethernet, 10 Base T; Relay Output
- Digital I/O Channels: 6
- Analog Channels: 6
- Form Factor: Panel / Chassis Mount
from Next Industries S.r.L
The OMNIAlog MI400 MAVT is an ultra low powered logger with integral modem designed specifically for remote applications. The next step up from the MI400 MAV, it has more analogue inputs and Modbus slave capabilities. 4 differential software programmable analog input. Each of the 4 channels offers... [See More]
- Outputs: Digital Output; Relay Output
- Differential Channels: Yes
- Analog Channels: 4
- Digital I/O Channels: 0
from Fortrans Inc.
Model 5000M pH Monitor and Data Logger System. The Fortrans, Inc. ® Model 5000M pH monitor and data logger system is a top-quality industrial process water pH monitoring system with built-in data logging capabilities. This pH monitor ensures that wastewater is being discharged under the legal... [See More]
- Outputs: Relay Output
- Form Factor: Panel / Chassis Mount
- Analog Channels: 2
- Application: Environmental
from Monarch Instrument
The DataChart 1250 is an economical dual input process recorder. It accepts thermocouples, RTD's, DC mA, DC Voltage, frequency and pulse inputs. CompactFlash cards up to 2 GB size can be used allowing many data points to be stored over long periods of time. With intuitive operation, flexible input... [See More]
- Outputs: Analog Voltage Output; Relay Output
- Sampling Frequency: 0.1000
- Analog Channels: 2
- Accuracy: 0.1000
from Gantner Instruments, Inc.
Q.monixx is a new addition to the Q.series product family – the ideal edge computing and data logging solution for reliable process control and asset monitoring. The standard I/O configuration for the Q.monixx includes up to 8 universal analog inputs, 8 digital inputs, 4 digital outputs, 2... [See More]
- Outputs: Status; Relay Output
- Digital I/O Channels: 14
- Analog Channels: 8
- Resolution: 24
from Sifam Tinsley UK
Features. • Visualisation of current and archived data according to customer configuration (synoptic maps, charts, tables) by any web browser. • Readout up to 2500 values from slave devices (up to 100 devices, each 25 registers). • User-friendly application for data configuration. [See More]
- Outputs: Analog Voltage Output; Analog Current Output; Relay Output
- Digital I/O Channels: 16
- Analog Channels: 12
- Form Factor: Panel / Chassis Mount
from CAS DataLoggers
Internal GSM Modem. The dataTaker DT82EM is an intelligent data logger that incorporates a built-in GSM modem with email and SMS support for automated data and alarm transfer from remote sites. The DT82EM features USB memory stick support, 18 bit resolution, extensive communications capabilities and... [See More]
- Outputs: 3 with Open Drain FET (Max. 30V, 100mA), 1 with Logic Output; Relay Output
- Digital I/O Channels: 4
- Analog Channels: 2
- Sampling Frequency: 0.0250
from OMEGA Engineering, Inc.
The OMEGA® iSD environmental monitor provides Web-based remote surveillance of environmental conditions in critical HVAC applications such as computer server rooms, clean rooms, laboratories, museums, warehouses, or any remote facility. View and record Temperature, Relative Humidity and Dew Point... [See More]
- Outputs: Relay Output
- Application: Environmental
- Form Factor: Panel / Chassis Mount
- DC Voltage: 9 - 12 V
from West Control Solutions
DataVU 7 provides advanced flexibility to meet a user ’s specific requirements without the need to change a process to fit the recorder. If process requirements are subject to change at a later date then the user benefits from the ease with which modifications can be made to the recorder... [See More]
- Outputs: Relay Output
- Digital I/O Channels: 24
- Analog Channels: 24
- Form Factor: Panel / Chassis Mount
from Next Industries S.r.L
The OMNIAlog MI480 is a smart datalogger that provides an extensive array of features that allow it to be used across a wide variety of applications. The MI480 is a robust, stand alone, low power data logger featuring USB memory stick support, 24 bit resolution, extensive communications capabilities... [See More]
- Outputs: Digital Output; Relay Output
- Differential Channels: Yes
- Analog Channels: 8
- Digital I/O Channels: 2
from Monarch Instrument
The DataChart 6000 is the most advanced paperless recording system available. It incorporates the latest in measurement, communication, interface and processing technologies to deliver unmatched performance for your data acquisition application. The Data Chart 6000 is like no other paperless... [See More]
- Outputs: Relay Output
- Digital I/O Channels: 12
- Analog Channels: 12
- Sampling Frequency: 0.0100