The pressure transmitters of the 21Y series have no internal seal and a high insulation voltage of 300 VDC, and are extremely resistant to environmental influences. The sophisticated compensation circuit makes it possible to specify a narrow total error band. A wide range of pressure connections and electrical connections are available to choose from.
The wireless mini-logger from MSR stores over one million measured values. By integrating it into a WLAN/WiFi network, the MSR145W2D can be used in practically any kind of measurement applications.
The WiFi data logger is an all-round talent when it comes to sensor technology: You can choose various internal sensors as well as up to five external sensors or connections. The FlexConnector offers the highest possible flexibility. The intelligent plug-in connection facilitates customer-specific adaptation of the desired FlexSensors.
No wiring costs and no time-consuming manual reading of measured values. Measured data can even be sent from places with difficult access. Integration either into an existing WiFi or via an access point, by means of mobile network access where required, into a separate wireless network.
When it comes to observing environmental conditions over a longer period of time, in many cases it is quite sufficient to transmit the collected data via WiFi once or twice a day. When configuring the MSR145W2D, you can set the time windows during which the data logger should connect to the WiFi network. The WiFi connection is thus only activated when it is needed – which has a positive effect on the battery life of the data logger.
With the MSR145W2D you have the option of using the MSR LocalCloud to store, manage and export the data either locally on your (company’s) own server or in the web-based cloud solution MSR SmartCloud. Via web browser you can view the measured values during operation.
In order to gain knowledge about the movement activity of dairy goats, MSR145W2D data loggers with acceleration sensors are used in a scientific research project. The loggers record the animals’ activities for 24 hours. The data transmission via WiFi takes place energy-savingly only once a day – when the goats are in the barn. This energy-saving data transmission allows the battery to run for more than 5 months. Should the WiFi connection fail, the data remain securely stored in the logger and can also be read out via USB.
For test measurements, it is often necessary to monitor measurement data in real time. In this case, the MSR145W2D is configured by the user so that the data is permanently sent to the WiFi network. Although the uninterrupted transmission of data results in higher power consumption, which affects the mobile operating time of the data logger, the data can be viewed immediately using MSR LocalViewer. For further processing, the measurement data can be sent to the cloud if required.
To determine load values, wireless MSR145W2D data loggers run along the production line at a beverage manufacturer. The measurement data is transmitted in real time via WiFi. Critical values are detected immediately. The recorded data not only help to gain insights into possible causes of increased wear in the production line, the implemented measures can subsequently be checked for their effectiveness with the data loggers
measurement rate up to 1000/s per channel · optionally temperature, humidity, air pressure, position and light sensors
Four integrated analogue inputs, a high measurement rate of 1000/s per channel and its gigantic memory capacity, all packed into a small format are the key characteristics of the swiss made MSR160 data logger.
The analogue inputs of the logger can be used for conventional sensors with analogue outputs (e.g. voltage, current, CO2 etc). The analogue inputs allow voltage and milliamp current to be measured at high data rates up to 1,000 readings per second. A multiple output switching power supply is also provided. Optionally, the MSR160 can be fitted with additional temperature, humidity, pressure, acceleration or light sensors.
The rugged but leightweight data logger records over 2,000 000 measurement parameters. With the optional microSD card you can expand the memory capacity to over one billion measurement parameters. All saved data can be rapidly transferred to a PC or laptop via the USB interface. The user-friendly data acquisition and analysis software is supplied free along with the data logger.
shock data logger with 2 acceleration sensors ±15 g and ±200 g · temperature, humidity, air pressure and light sensors available · stores 2 million total readings · air cargo approved
Whether it be to verify questions of liability, detect damage early or to optimise packaging: The MSR175 data logger accurately records critical transport events such as shocks, jolts or fluctuations in temperature, pressure or humidity and provides clarity with objective measured data.
The two digital 3-axis-acceleration sensors (± 15 g and ± 200 g) integrated in the MSR175 record shocks at a measurement frequency of up to 6400/s. The storage capacity of over 2 million measured values is sufficient to record at least 1,000 shocks (230 mAh Li-Po battery) or approximately 1,000 shocks (3.6 V, 7700 mAh Li-SOCI2 battery), depending on the type variant.
In addition, the transportation data logger measures and records temperature profiles from -20° to +65 °C. Further type variants of the MSR175 are available with internal humidity, air pressure and light sensors.
The software package for the MSR175 includes 3 programs: MSR175 Dashboard, MSR ReportGenerator and MSR ShockViewer. The MSR Dashboard allows you to configure the logger with just a few mouse clicks. The data recorded can be quickly transferred to a computer via the USB port. A single click on the MSR ReportGenerator is sufficient to call up a compact report. For a detailed measured data analysis, the MSR ShockViewer, which is integrated in the MSR175 software package as a free basic version, is at your disposal.
The pressure transmitters of the 7LD series use the chip-in-oil technology developed by KELLER, uniting a pressure measuring cell, digital temperature compensation and signal processing in a compact housing made of stainless steel or Hastelloy. The transmitters are extremely resistant to environmental influences and delivery highly accurate measurement results as a digital output signal. The I2C interface and the low supply voltages make it easy to integrate in microcontroller-based systems. The extremely low power consumption is ideal for battery-operated devices. The D line is perfect for IoT solutions.
The low-cost OEM pressure transducers of the 6S series are based on a piezoresistive measuring cell with a brazed metal diaphragm in a steel housing.
KOLIBRI Desktop offers all the options for device configuration and displays current measured values and logger recordings in graph form. Thanks to the search and filter options, saved measurement data can be organised with ease and exported as an image, as an Excel or Word report, or in additional formats. All products in the KOLIBRI suite are inter-compatible and can exchange data with one another. The functions are continually being further expanded and optimised.
KOBOLD pressure transmitter series PDA are cost effective electronic pressure transmitters with digital indication of actual pressure. An analogue output (0)4- 20 mA is available for remote transmission of the measured value. The device is also available with a switch output as well. A piezzo resistive ceramic sensor is used. The units can be used where high switching accuracy is needed. Long term stability, repeatability and the compact and robust design make them ideal for use in OEM applications.
The Series PD-39 X does not measure the differential pressure directly – instead, it uses two absolute pressure sensors to take the measurement indirectly. As well as reducing costs, this differential pressure transmitter is also more robust in relation to unbalanced (one-sided) overloading. The differential pressure range should be at least 5% of the standard pressure range. Each pressure side has two pressure connections, so the Pressure measurements can be displayed and recorded on PC or Laptop with help of the software ControlCenterSeries30 (CCS30) and a seriel interface cable. Export of recordings to usual file formats possible. Up to 128 devices can be connected together into a KELLER Bus-system. The Series PD-39 X does not measure the differential pressure directly - instead, it uses two absolute pressure sensors to take the measurement indirectly. As well as reducing costs, this differential pressure transmitter is also more robust in relation to unbalanced (one-sided) overloading. The differential pressure range should be at least 5% of the standard pressure range. Each pressure side has two pressure connections, so the PD-39 X is easy to use in pressure lines So that the differential pressure can also be measured exactly if the standard pressure range/ differential pressure ratio is high, this series also features the tried-and-tested microprocessorbased technology that is used in Series 30 X. All reproducible pressure sensor errors (i.e. nonlinearities and temperature dependencies) are entirely eliminated thanks to mathematical error compensation. The sensor signals are measured with a 16-bit A/D converter, so the individual standard pressure ranges can be measured to an accuracy of 0,05%FS throughout the entire pressure and temperature range. Digital Interface The transmitters have a bus-compatible two-wire RS485 half-duplex interface which is modelled on the ”MODBUS RTU”. KELLER offers interface converters to RS232 or USB for use here. The READ30/PROG30 program and the protocol are freely available. The interface offers these capabilities: - Readout of pressure and temperature values for both sensors. This allows readout of the diffe- rential pressure as well as the two standard pressure ranges. - Calibration of zero points and amplification. - Scaling of the analog output to different pressure ranges or units. - Configuration settings such as measurement rate, low-pass (LP) filter, bus address, etc. - Readout of information such as serial number, compensated pressure and temperature ranges, etc. Analog Output The analog output is freely scalable via the interface. For flow measurements, the root of the differential pressure can also be outputted. The calculated value can be outputted via an analog interface (0…10 V or 4…20 mA).
The high-accuracy LEO-Record-Ei digital manometers can record pressure and temperature autonomously for long periods thanks to their memory function. The data logger can be connected to a computer via the RS485 interface for configuration and for reading out the recorded data. The current pressure value can be displayed in a wide variety of units of pressure. Power is supplied by a high-quality 3,6 V lithium battery.
Intrinsically safe – suitable for use in explosive atmospheres.
4 digit ASCII bus/DIG bus,45mm display
The vacuum test pump LR-Cal 2941 is used to generate vacuum (negative pressure) for checking, adjusting and calibrating mechanical and electronic pressure measuring instruments by comparative measurements. These vacuum tests may be carried out in laboratories, workshop or on site at the measuring point. If the instrument to be tested and a sufficiently accurate reference measuring instrument are connected up to the test pump, the same vacuum is applied to the two measuring instruments when the vacuum test pump LR-Cal 2941 is is operated. By comparing the two measure valuses at random pressure values, the accuracy can be verified or the instrument under test can be adjusted. Despite its compact dimensions, the vacuum test pump LR-Cal 2941 is easy to operate and allows for exact generation of the required test vacuum. The LR-Cal 2941 is fitted with a fine adjustment valve for precise adjustment of vacuum. Pressure connection is made with 4 mm hose, a T-piece wich quick-coupling and a piece of hose is included in standard delivery.
Series 22 DT was developed and homologated specially for use in so-called "bivalent" vehicles fitted with engines for combined natural gas/gasoline operation. The unconventional design with a small mass swept by the flow results in a fast response with temperature changes, the temperature being measured by an NTC or PT sensor located directly behind the stainless steel separating diaphragm. The same diaphragm transmits pressure via a capillary to a stress-free mounted silicon measuring cell. The signal processing for pressure and temperature is carried out by an electronic module connected to the sensors by flexible conductors. Mounted to the back of the electronic module, which is directly connected to the 6-pole plug connector are the EMC protection components. A special feature is the immunity from interference from electromagnetic fields up to 200 V/m.
The pressure transmitters of the 21C series with ratiometric 0,5...4,5V output combine chip-in-oil measuring cells with conventional electrical connections and pressure connections, making them ideal for industrial use. The transmitters are extremely resistant to environmental influences and deliver accurate measurement results over a temperature range of -40 °C to 125 °C.
The pressure transducers of the 9L series have a compact, robust housing made of stainless steel, giving them outstanding long-term stability for a range of OEM applications. The metal diaphragm is welded on front-flush and gap-free, separating off the piezoresistive pressure sensor, which is made of silicon, from the measuring medium. Every pressure transducer is measured over the entire pressure and temperature profile and is supplied with a detailed calibration sheet .
In the 23SXc series high-precision pressure transmitters, temperature dependencies and non-linearity are precisely compensated for by means of a mathematical model in the microcontroller. With the CANopen interface, KELLER offers a highly accurate pressure transmitter that is optimally suited for a wide variety of automation solutions. The fully welded construction without internal seals is suitable for dynamic applications. Only stainless steel is in contact with the media.
In the 23SX series high-precision pressure transmitters, temperature dependencies and non-linearity are precisely compensated for by means of a mathematical model in the microcontroller. In addition to the RS485 interface with Modbus RTU protocol, there is also the option of outputting the measurement results as a scalable analogue signal via the integrated D/A converter. The fully welded construction without internal seals is suitable for dynamic applications. Only stainless steel is in contact with the media.
The Series 41 X combines the ceramic measurement cell for low pressure ranges with the µP electronics of the digital Series 30 transmitter. The pressure values from the signals of the pressure and temperature sensors are determined by polynomial compensation (see reverse). The values can be displayed and stored on a PC via an RS485 interface and programming can also be carried out. The transmitters are calibrated to the base range. The PROG30 software permits programming of the analog output signal in each section of the range within the base range (e.g. range 100 mbar. Output 4…20 mA for 20…60 mbar). With KELLER RS converters K-100 Series, up to 128 transmitters can be hooked together into a bus system and read by means of a PC or laptop. READ30 software allows the current pressure of each transmitter to be read or the pressure activity of several transmitters to be recorded or stored whilst “on line”.
6 Digit ASCII bus/DIG Bus, 20mm display
The Series 1000 and 2000 are a range of extra large 3 to 5 digit LED array displays, 125 mm digit height, designed to be used in process / temperature / weighing applications where high visibility and distant viewing is required. Using high intensity wide angle LED's in an IP65 enamelled steel housing ensures clear viewing distances of greater than 50 metres. For high ambient temperature conditions, an optional special coated glass window is available. Typical applications include downtime, time and production control in large factories, the indication of load cell inputs / crane overload protection, process signals such as temperature, pressure, level, and AC or DC voltages and currents. For electrical specifications, input signal details, as well as the terminal connector assignments in the Extra Large Display, see the individual indicator operating manuals (e.g. Model 4001). Standard DPM indicators are used and internally fitted for the internal signal conversion for the Extra Large Displays. (Models ending in a 2)
Series 22 offers a reliable cost effective solution for customers requiring medium to high quantities, of mass produced transmitters. Utilising the KELLER automatic brazing lines, this new technology allows crevice-free construction of the pressure port with no internal seals or O-rings, making possible high volumes at low cost. In the brass 22 M, a steel insert and a nickel diaphragm are brazed into a brass housing. In the steel 22 S, all parts are stainless steel (AISI 316 L). The glass feed-through header and silicon pressure sensor are welded to the steel insert underneath the oil filling. The electronic circuit is fitted to the Packard plug. EMC-protection-components are mounted on the plug side, the amplifier on the sensor side. A flexible printed circuit “TAB” connects the sensor with the electronics. The transmitters are designed to have exceptionally good EMC ratings and operate over a wide temperature band, ideal for automotive, hydraulic and refrigeration control applications
The Series PRD-33 X was developed for applications that require a high accuracy differential pressure measurement together with high overload resistance in differential pressure ranges as low as 350 mbar. The Series PRD-33 X is the result of ongoing development of the KELLER PD-33 X differential pressure transmitter. Thanks to a second integrated pressure sensor, the line, or common mode, pressure can now be measured along with the differential pressure, resulting in several notable features not found in traditional differential pressure transmitters. For example, compensation for line pressure effect is now accomplished during factory calibration. Moreover, both differential and line (absolute) pressure may be read by the user. In addition, the PRD-33 X features high differential overload resistance; e.g., ± 35 bar with a differential measuring range of only 350 mbar (100:1). The internal differential pressure sensor element is isolated from the High (+) side media by a compliant stainless steel diaphragm, while the Low (-) side media impinges directly on the back side of the silicon measuring cell. Also isolated from the High (+) side media is the line (absolute) pressure sensor. The floating sensor assembly guarantees maximum decoupling from external mechanical forces. Another notable feature of the Series PRD-33 X is the robust digital RS485 bi-directional communication interface. Information such as serial number, pressure range, filter settings and process values for both differential and line (absolute) pressures and their temperatures are easily obtained. This combination of features enables certain measurements not possible with traditional differential pressure transmitters. For example, filling levels in liquefied gas storage tanks, including oxygen, nitrogen, carbon dioxide and argon can now be measured safely, accurately and at reasonable cost.
The pressure test pump LR-Cal 2911 is used to generate pressure for checking, adjusting and calibrating mechanical and electronic pressure measuring instruments by comparative measurements. These pressure tests may be carried out in laboratories, workshop or on site at the measuring point. If the instrument to be tested and a sufficiently accurate reference measuring instrument are connected up to the test pump, the same pressure is applied to the two measuring instruments when the pressure test pump LR-Cal 2911 is is operated. By comparing the two measure valuses at random pressure values, the accuracy can be verified or the instrument under test can be adjusted. Despite its compact dimensions, the pressure test pump LR-Cal 2911 is easy to operate and allows for exact generation of the required test pressure. The LR-Cal 2911 is fitted with a fine adjustment valve for precise adjustment of pressures. Pressure connection is made with 4 mm hose, a T-piece wich quick-coupling and a piece of hose is included in standard delivery.