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January 27th, 2012
Instrumentation specialist Impress Sensors & Systems Ltd has launched a new compact, multi-channel controller with large touchscreen colour TFT display and up to 72 digital inputs/outputs. The controller is therefore ideal for the simultaneous measurement and control of a wide variety of process engineering applications.
The new CMC-141 controller is the ‘big brother’ of the CMC-99, providing all the same functionality and features, but also offering a larger 5.7-inch (320 x 240 pixels) backlit display, more inputs/outputs (up to 72) and new types of logic channels. The CMC-141 now provides brand new channels, including a universal input card that can accommodate a range of sensor inputs. New counter inputs are provided too, as well as additional flow meter and rate meter inputs. Despite these extra features, the CMC-141 is still housed in a compact enclosure with the same panel insertion depth (100mm) as the CMC-99.
 New CMC-141 multi-channel controller has a larger display and more I/O options Sam Drury, Sales & Marketing Director at Impress Sensors & Systems comments: “Another added value feature of the CMC-141 is that it comes with JAVA applets, which can be embedded into any website or HTML-based web page, allowing users to remotely access real time data from the controller via the Ethernet interface and a web browser.”
The CMC-141 can simultaneously record all channel data at a maximum speed of 10Hz (ten samples per second). The unit provides up to 1.5GB of internal data memory, which is sufficient to continuously save data from all input channels at a speed of 1 sample per second for more than 2 months (125,000,000 samples in total). The operator can download saved data using a USB flash memory disk or remotely via Ethernet.
The CMC-141 provides three card slots on the reverse of the controller, each comprising 24 I/O pin options, which enable the user to choose any combination of inputs and outputs to suit the application. For example, up to 72 analogue current or voltage inputs could be used; up to 36 relay/SSR outputs; 36 thermocouple inputs; 18 RTD inputs; or a combination of these. The unit also incorporates a 24V DC digital input, enabling relays and triggers to be set up.
The CMC-141 is low cost compared to existing alternatives on the market and is ideal for a wide range of process applications, including centralised temperature measurement and control; multi-zone heating control; intermediate pumping station control; spraying and heating control for greenhouses; control of industrial furnaces and incinerators; and for engine test cell measurements.
Measuring just 144mm x 144mm x 100mm, the controller housing is very compact, which means the unit can be installed in restricted spaces. The controller has a 5.7-inch backlit colour TFT display and is based on the Linux operating system, with touch-screen menu navigation, offering ease of use and familiarity to the operator. A USB interface is provided on the front of the device, enabling the user to upload or download software programs quickly and easily via a USB memory stick.
PID Control
The controller is available in two power supply versions, 230V or 24V AC/DC. An auxiliary 24V DC/200mA supply output on the back of the unit enables external sensors and actuators to be connected and powered by the controller. The CMC-141 can also act as a PID process controller, providing a reliable control loop feedback mechanism for a variety of process temperature and pressure control applications.
The CMC-141 also comes with a number of communications interfaces, including two RS485 ports, one RS232, one Modbus RTU, a second USB Host and a 10MB Ethernet connection, allowing the controller to integrate easily with the customer’s existing process control networks and fieldbuses.
The CMC-141’s integral software provides the user with archiving, printing and visualisation options. A variety of visual presentation display options for recorded measurements are available, including numerical display, bar graph or needle gauge display.
For more information on the CMC-141 multi-controller, please visit the website at www.impress-sensors.co.uk or call the sales team on 0118 981 7980.
Posted in Digital Indicator, Indicator, PID Controller, Pressure Displays, Process Indicator | No Comments »
December 3rd, 2010
Digital pressure gauges are pressure monitoring devices that convert the applied pressure into a displayed signal. These signals are usually displayed numerically. To suit your application needs, different pressure-gauging technologies are now available. Devices include those that use mechanical deflection with a flexible or elastic element like a diaphragm that retorts to the pressure changes.
Digital pressure gauges that feature bridge circuit also use a diaphragm, but only to detect the capacitance changes. Usually, strain-sensitive variable resistors or strain gauges are used as elements in Wheatstone bridge circuits to perform pressure measurements.
Other types of digital pressure gauges use vibrating elements, pistons, a thin film or microelectromechanical systems (MEMS) to sense the pressure changes. Some devices even use piezoelectric sensors for measuring the quasi-state and dynamic pressure. Usually, these types of sensors have two modes – voltage and charge. While the charge mode produces a high-impedance charge, the voltage mode makes use of an amplifier to convert the high-impedance charge into a low-impedance output voltage.
The workings of different types of pressure gauges
Digital pressure gauges can perform different pressure measurements and display the amount in different units.
The most common type of pressure measurement is gauge pressure measurement which is proportionate to the surrounding atmospheric pressure. On the other hand, the sealed gauge pressure corresponds to 1 atmospheric pressure (oz) at sea level.
Some digital pressure gauges display measurements in kilopascals, millibars or bars, pounds per square inch (PSI), centimetres or inches of mercury, feet or inches of water, kilograms per square centimetre and ounce per square inch.
Posted in Digital Indicator | No Comments »
October 6th, 2010
Pressure sensors are commonly used in industries to prevent the overloading of their expensive machinery. The primary function of a pressure sensor is to monitor the load on a particular machine and alert the operator in case of increased pressure level. Also known as senders, indicators or transmitters, these products are used for day-to-day activities. Pressure sensors make it possible to measure different variables like water speed, altitude and level, gas flow and fluid flow. There are different types of pressure sensors that use different technologies and used for different applications.
Digital pressure sensors are one of the commonly used pressure sensors. These sensors hold a significant advantage over other types. Mentioned below are some benefits of using digital pressure sensor.
Zero interference: Analogue pressure sensors experience interference that can alter the reading thereby providing wrong data to the operator. On the other hand, a digital pressure sensor transmits either a complete signal or nothing at all.
Conversion: A digital signal does not need to be converted to an analogue one at anytime between pressure sensor and logging or displaying instrumentation. This is because digital pressure sensors can be interfaced to a computer
Replication feature: Digital pressure sensors can characterise analogue sensors over temperature and pressure joints by eliminating all linearity errors.
In order for a digital pressure sensor to function properly, you would require an output signal that has a very high resolution and which cannot get corrupted easily. This provides one of the highest-pressure sensor accuracy and hence is ideal for companies.
Posted in Digital Indicator | No Comments »
March 8th, 2010
The CMC-99 controller from Impress Sensors & Systems Ltd provides an incredible variety of input and output combinations to suit individual customer requirements. The three card slots on the reverse of the controller each comprise 16 x I/O pin options, which enable the user to choose any combination of inputs and outputs to suit the application. For example, up to 48 x analogue current or voltage inputs could be used; up to 16 x relay/SSR outputs; 24 x thermocouple inputs; or 12 x RTD inputs; or a combination of these. The unit also incorporates a 24V DC digital input, enabling relays and triggers to be set up.
The CMC-99 is low cost compared to existing alternatives on the market and is ideal for a wide range of process applications, including centralised temperature measurement and control; multi-zone heating control; intermediate pumping station control; spraying and heating control for greenhouses; control of industrial furnaces and incinerators; and for engine test cell measurements.
Measuring just 96mm x 96mm x 100mm, the controller housing is very compact, which means the unit can be installed in restricted spaces. The controller has a 3.5-inch backlit colour TFT display and is based on the Linux operating system, with touch-screen menu navigation, offering ease of use and familiarity to the operator. A USB interface is provided on the front of the device, enabling the user to upload or download software programs quickly and easily via a USB memory stick.
PID Control
 The controller is available in two power supply versions, 230V or 24V AC/DC. An auxiliary 24V DC/200mA supply output on the back of the unit enables external sensors and actuators to be connected and powered by the controller. The CMC-99 can also act as a PID process controller, providing a reliable control loop feedback mechanism for a variety of process temperature and pressure control applications.
The CMC-99 also comes with a number of communications interfaces, including two RS485 ports, two RS232, a second USB Host and an Ethernet connection, allowing the controller to integrate easily with the customer’s existing process control networks and fieldbuses.
The CMC-99’s integral software provides the user with archiving, printing and visualisation options. A variety of visual presentation display options for recorded measurements are available, including numerical display, bar graph or needle gauge display.
 The CMC-99 is also available with a transparent, lockable door to IP42. An IP65 version is supplied with an additional fitted moulded frame.
Download the Product Datasheet: CMC-99
Product Page: Multi-channel touchscreen indicator products page
For more information on the CMC-99 multi-controller, please call the sales department on 0118 981 7980 or visit the website at www.impress-sensors.co.uk
Tags: Digital Display, Digital Indicator, Digital Process Indicator, Indicator, Multi-channel indicator, PID Controller, touchscreen display
Posted in Digital Indicator, Indicator, PID Controller, Process Indicator, Uncategorized | No Comments »
August 18th, 2009
 DS Series Combined pressure transmitter, pressure switch and pressure display The DS range of pressure transmitter, switch and display combination is a three-in-one multi-function pressure sensor with signal conditioning which gives a current or voltage output signal, 1, 2 or 4 x independent PNP transistor switch outputs and a freely scalable and programmable led rotatable display! The potential for this device is a complete control system in a single device, cutting installation and equipment costs and configuration to your exact control requirements.
With pressure ranges spanning from 10mbar on the DS 210 through to 600 bar on the DS 200 within the DS series we should be able to cover all requirements on air pressure measurement and liquid pressure sensing alike. The DS range will cover your requirements for an air pressure transmitter, oil pressure transmitter, hydraulic pressure transmitter and also if it’s just a simple pressure switch that you require then this device will solve that requirement also.
There are several options available within the range including:
- ATEX certification
- 1, 2 or 4 switch points
- analogue output in either 4-20mA, voltage or none!
- electrical connection
- process connection type
There’s also the option for a 3-wire 4-20mA configuration which allows for re-calibration of the 4-20mA output signal, not only is the display scalable, the output is also!
The digital LED display on the device is freely rotatable through 2-axis so you will always be able to see the display clearly. If installed on a vertical pipe horizontally then simply rotate the display through the body until it is face on and then rotate it on the display part so the readings are horizontal. The brightness is also adjustable depending on the environment you are installing to.
The DS 210 – Air pressure sensor switch
Suitable for air pressure and non aggressive gases, the start of measurement is from as low as 10mbar through to 1000mbar Gauge reference only. Vacuum pressure ranges also available.
The DS 201 – Ceramic pressure sensor switch and display
Suitable for Gases and Liquids from pressure ranges from 600mbar through to 600 bar Gauge or Absolute reference making this suitable for gauge pressure sensor, absolute pressure sensor requirements and absolute pressure switch applications also.
The DS 200 – Stainless steel pressure sensor switch and display
Suitable for Gases and Liquids compatible with the stainless steel media isolated diaphragm. Pressure ranges from 100mbar through to 600 bar Gauge or Absolute reference, being based on a silicon pressure sensor with stainless steel diaphragm the over pressure capability is inherently higher and also the resolution is higher than the DS 201 with the ceramic pressure sensor.
The DS 230 – OEM Digital pressure switch with display
Suitable for Gases and Liquids compatible with the ceramic diaphragm and FKM internal O-ring seal. Pressure ranges from 2 bar through to 400 bar Gauge reference only. This is a lower cost version with less accuracy and no transmission of output, just purely a pressure switch and pressure display device targeted at OEM applications.
The DS series pressure transmitters, switches and display products are very diverse in their capabilities as a control device, please contact sales for a discussion on to how best implement the pressure product into your application.
Product Datasheet: ME501/505 datasheet, ME651/662 datasheet
Product Page: Ceramic pressure sensor products page
If you have any applications you wish to discuss or any questions questions regarding this product then please contact sales here sales@impress-sensors.co.uk
Product Datasheet: DS 210, DS 201, DS 200, DS230
Product Page: Combined Pressure Transmitter, Pressure Switch and Display products page
If you have any applications you wish to discuss or any questions questions regarding this product then please contact sales here sales@impress-sensors.co.uk
Tags: Adjustable Pressure Switch, ATEX Pressure Switch, Digital Display, Digital Pressure Gauge, Pressure Switch, Pressure Transmitter, Programmable Pressure Transmitter
Posted in Digital Indicator, Low range pressure transmitter, Pressure Displays, Pressure Gauge, Pressure Switch, Pressure Transmitter with Display | No Comments »
July 24th, 2009
 SRP-94mV Digital Process Indicator The SRP range of process indicators and displays supplied by Impress Sensors & Systems Ltd have been upgraded to accept inputs from millivolt (mV) sensors such as strain gauges, piezo-resistive pressure sensors and any other sensing device that will output a mV signal relative to the measurement.
The two standard versions of the SRP that now include the mV are the SRP-73 and SRP 94. The SRP-73 is 72 x 36 x 97 mm in size and has a 13mm high 4 digit display. It also has the option of 0,1 or 2 relay outputs which are fully programmable from the push buttons on the front of the device. It can also be freely scaled to show any engineering units to display the reading.
The SRP-94 is 96 x 48 x 100 mm in case size but has a much larger display at 20mm high and also a 4 digit display. The SRP-94 has the option of 0, 2 or 4 relays outputs which is excellent for a low-low and high-high alarm system providing a full control system with 2 simple components, a sensor and a indicator to switch on fans, pumps and other controls. The SRP-94 also has the re-transmission of signal so this can be output to a PLC on additional controller for full PID control functions. The display colour can also change according to the switch status of the device from RED to GREEN which is a unique function on process indicators!
Both devices are equipped with RS-485 Modbus RTU communications which means they can be accessed, setup and real-time readings by a PC. When used in conjunction with the supplied software you will have access to ever configurable parameter and tailor the operation of the device to your requirements.
The SRP indicators will also supply a 24V dc voltage to the sensors / transducers so reduces the need to spend extra money on transformers or power supplies to the sensors! On board maths functions are as standard in the device offering linear, root, square and user defined calculations with a maximum of 20 points.
To see a brief video of the display in operation with 4 relays switch points and the changing display colour please follow this link!
Product Datasheet: SRP-73mV datasheet, SRP-94mV datasheet
Product Page: Process Indicators and displays product page
If you have any applications you wish to discuss or any questions questions regarding this product then please contact sales here sales@impress-sensors.co.uk
Tags: Digital Display, Digital Indicator, Digital Panel Meter, Digital Process Indicator, Indicator, Panel Meter, Process Indicator
Posted in Digital Indicator, Digital Panel Meter, Indicator, Process Indicator | No Comments »
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