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:

1. ATEX certification
2. 1, 2 or 4 switch points
3. analogue output in either 4-20mA, voltage or none!
4. electrical connection
5. 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: 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

DS Series combined pressure transmitter, pressure switch & display! is a post from: Impress Sensors

Pressure sensors vary considerably in their design technology used, performance and application.  Pressure sensors often can be referred to as pressure transducers, pressure transmitters, pressure indicators or pressure switches – are used to measure the pressure of gases and liquids (fluids).

Pressure is an expression of the force and is normally stated in terms of force per unit area. A pressure sensor will generate an electrical signal relating to the pressure imposed. This signal is either analogue or digital in more modern designs, although optical, visual and auditory signals are also common.

Pressure sensors, basics of pressure measurement

Industrial pressure transducers normally have a diaphragm type design that uses strain gauges, which are either bonded to, or diffused into it, with the strain gauges acting as resistive elements. Under the pressure-induced strain, the resistive values change. In capacitive technology, the pressure diaphragm is a single plate of a capacitor that changes its value under pressure-induced displacement. These are probably the most common technologies used in industrial applications for their favourable price/performance ratio.

Pressure is measured against a reference, which greatly depends on the application and installation of the sensor. Depending on the relevant pressure, the term ‘absolute’ is used when the reference is vacuum; ‘gauge’ is used where the reference is atmospheric pressure; and ‘differential’ is used where the sensor has two ports for the measurement of two different pressures.

Pressure sensors are used in a wide variety of applications for control and monitoring purposes. Pressure sensors can also be used to indirectly measure other variables such as liquid or gas flow (in conjunction with an orifice plate), speed, fluid level and also altitude.

Due to the wide range of technologies available, pressure sensors vary considerably in their design, performance, application and cost. Every technology has its own benefits and reasons for selection within an application.

When used directly to measure pressure, applications include meteorology instrumentation, aerospace and defence, research and development, automotive and other machinery or equipment that has pressure functionality implemented. Other applications for pressure sensors include hydraulic and pneumatic systems, water depth, offshore & marine, waste water & sewage, oil & gas exploration, nuclear, medical, food and beverage processing, tank level/contents, HVAC systems, agricultural equipment, environmental monitoring and chemical & processing plants.

Pressure Products Page:  Impress Sensor pressure products page

Basics of pressure measurement is a post from: Impress Sensors

Battery Operated Digital Pressure Gauge

The BAROLI battery operated digital pressure gauge has an unrivaled continuous operation time of 1800 Hours!  Using 2 x half AA battery’s that are available from most local  battery suppliers, the BAROLI can work without having the power turned off for up to 1800 hours (75 days).  The device can also be set via the push-buttons on the display to have an automatic switch off after 1,2,3,4 or 5 minutes to further extend this lifetime.

The digital pressure gauge is available with two different sensing technologies installed internally, the first option is the low cost ceramic piezo-resistive pressure sensor which has a pressure range from 1 bar up to 400 bar Gauge or Absolute.  The second option is the stainless steel media isolated silicon sensor with pressure ranges from 100mbar through to 600 bar also in gauge or absolute reference.

The accuracy performance of the ceramic sensor will offer better than 0.25% FS BFSL and the silicon sensor with the improved resolution will offer better than 0.125%.   Both version are temperature compensated and offer excellent stability.  The update rate of the displayed reading is 5 per second which is more than adequate when being used as a visual indication of changing pressure.

The display is LCD with a very visible 40 x 30mm screen size.  The main display area is 4.5-digit 7-segment with a digit height of 11 mm.  It also has an information line on the display which is 6-digit 14-segment and a digit height of 7.5 mm which displays useful information when navigating the menu.  The Housing of the display is PA material with a unique feature that is can rotate in 2 axis through 270 degree’s.  This means where ever the display is installed with a simple twist and turn of the display unit you can always make the display visible to the user!

Some interesting features  on the menu options…

1) Zero ‘Tare’ – This means if there is an offset in the pressure line or after fitting a pressure seal there is a slight offset then this can be removed by a simple push of the buttons on the display

2)  Changing of engineering units – the standard is Bar but this can be changed to mbar, PSI, mWs, inHg, cmHg, mmHg, kPa, MPa without affecting the calibration.  The device will automatically apply the calibration factors required for the change of scale!

3)  You can tell the device what switch off time you require or leave the display on permanently

4)  Minimum and maximum display of the pressure reading – When using the device and you need to know what the minimum pressure or maximum pressure the device has been exposed to then this can be looked up in the menu, this is particularly useful when diagnosing a fault in a process where the sensor can record and over pressure for example

5)  Re-calibration of the full scale pressure range – If you have a pressure source and you feel it is necessary to re-calibrate the device to take out any offsets then this can easily be done by generating the correct pressure and pressing the span calibration in the menu

6) Reset to factory default – When you just need to reset the calibration to factory default if for instance you’ve calibrated the device to the incorrect pressure then all is not lost, just restore to factory default settings with a couple of presses of the buttons!

Impress Carry a stock of these devices so are available for ex-stock delivery internationally!  The standard process connection is G 1/2″ male to DIN 3852 but other fittings such as NPT are also available to order.

Product Datasheet: BAROLI Battery operated digital pressure gauge

Product Page: Pressure products with displays

If you have any questions or would like a quotation on the BAROLI battery operated digital pressure gauge then please contact us using either the contact form or directly by email to sales@impress-sensors.co.uk

Battery Powered Digital Pressure Gauge – 1800 hours continuous operation! is a post from: Impress Sensors