Senstronics leading edge sensor solutions Superior thin film sensing products Storm - the future of pressure and temperature measurement www.senstronics.com 1 Senstronics Company Introduction The Headlines The Headlines At Senstronics we believe that to build the world’s finest range of sensing products we must + Total Error Band Pressure 1% (per 100˚C ) employ the latest art, with an uncompromising attitude. Senstronics is proud to present the - + Storm programme, a unique range of products that has been constructed to provide you, Temperature 1% (per 100˚C ) - our customer with "a life time of accuracy". Operating Temperature -40 to 125˚C Located in the United Kingdom, Senstronics takes an immense pride in its ability to support the individual needs of our international customer base. The range of engineering skills contained within the Group's Technology Long term stability 0.1% Centre will ensure that as we come to know more of each other, (10m cycles) Senstronics will become your sensing partner of choice. EMC Rating >100volts/metre Install Storm and have quiet nights. S.B. Turner Group C.E.O. The Storm Family Storm 10 Pressure Transmitter Storm 30 Pressure Transducers Storm 50 Joint Pressure and Temperature Transducers Storm 70 (available Q1, 2004) Pressure Transducers with integral pressure switch Digital Engineering Digital capability offering PWM and CAN ISO Accreditation gained 2001 Contents The Headlines 2-3 Senstronics Technology 4-7 Product Build & Testing 8-13 Features & Specifications 14-17 Product Range Options 18-19 Contact us 20 2 3 Storm stability and performance by design Senstronics Sensing Technology Principles Why thin film electronic strain gauge? Pressure can be measured in a variety of ways although • Long term stability fundamentally based on two key principles: • Ease of temperature compensation 1. Wheatstone bridge • No oil fill Bridge resistors are placed on a Wheatstone bridges can be made from metal Vs • Wide operating range of pressure and flexible diaphragm in such a resistors or piezo resistive materials. The latter temperature from one single element profile way that they are stretched or offers greater signal outputs from the compressed under pressure. The unconditioned bridge due to crystal lattice dopant R2 R1 physical changes cause a effects as well as the mechanical distortion. • High volume processing is feasible change in resistance and a Vh VI differential output signal that Bridges can be bonded onto diaphragms via a • Signal linearity is directly proportional to the R4 number of techniques including glues, R3 applied pressure. silicon/ceramic fusion, or direct molecular bonding (PECVD or sputtering). Occasionally All piezo resistive and silicon based Oil fill isolation causes unwanted thermal instability due to piezo-resistive elements are incorporated into oil Tmp Rc Gnd filled isolation cells protecting the strain gauge technologies are prone to long term differing co-efficients of thermal expansion of oil and steel from corrosive chemical media. drift caused by dopant migration and enclosures. Non-linearity over temperature is a significant fermi-level effects. These effects are problem where accuracy is required. There is also the 2. Capacitive exaggerated at elevated temperatures, potential of leak-paths from or past the oil filled cell, which and also by extended pressure cycling. may be undesirable. The operational temperature range is The capacitance of two conducting Capacitive pressure sensors can be constructed in ceramics, via advanced MEMS technology planes is measured. Under pressure limited at both high and low extremes. (dies), or built into semi-conductor layered the plates are forced together reducing the capacitance in line materials. Depending on the technology used with applied pressure. the sensor elements are either packaged and used as produced, bonded (fused) onto metal/glass substances or incorporated into oil y = 0.0016x + 3.9396 filled cells. 2 Electronic strain gauges 4.10 R = 0.9857 4.09 produce very linear and 4.08 predictable signals over 4.07 References 4.06 temperature. Transducers and Interfacing - principles and techniques; B.R. Bannister & D.G. Whitehead (Van Nostrand Reinhold (UK) 4.05 Fundamentals of Pressure Sensing; Jon Wilson, Principal Consultant, The Dynamic Consultant, LLC (www.sensorsmag.com) Understanding this 4.04 For further reading on this and related topics, see these Sensors articles. behaviour allows 4.03 "Bringing MEMS Pressure Sensors to Market—Fast," January 2001 4.02 Senstronics to "Using the IEEE-1451.2 Correction Engine to Compensate a Multivariable Smart Pressure Transmitter," August 1999 4.01 manufacture inherently 4.00 "Fundamentals of Pressure Sensor Technology," November 1998 stable sensor elements in 3.99 3.98 high volume with dual Post trim URES 3.97 7.826e - 003 pressure and temperature 7.174e - 003 3.96 6.521e - 003 3.95 outputs. 5.869e - 003 5.217e - 003 10 20 30 40 50 60 70 80 90 4.565e - 003 3.913e - 003 3.261e - 003 Temperature degC 2.609e - 003 1.956e - 003 1.304e - 003 6.521e - 004 1.000e - 030 100 bar example - Static displacement Units mm - Deformation scale 1:100 4 5 Pre trim Offset Rb (mV) Storm stability in a changing environment Senstronics Senstronics Technology Source: Senstronics Quality Audit Testing A new team for a new challenge. Thermal Cycle Test The Senstronics thin film technology and its manufacturing process have no equals, a just reward for six years dedication and the search for uncompromised perfection. The Team’s commitment to philosophy that believed that the benefits of long term stability and measurement accuracy should be available to all customers at no extra cost, has resulted in a manufacturing process called TCAS which simply means "Thermal Compensation At Source". TCAS working together with the Senstronics element TM technology called Thermotec ensures that sensing elements leave the Fab for final assembly, manufactured to a staggering thermal accuracy of less than 0.005% / degree C. Offset/Span Versus Temperature Endurance Cycle Test Thin Film is renowned for its mechanical stability and repeatability 6 7 Storm - a lifetime of accuracy Senstronics Engineering Welding but don’t just take our word for it . . . Design Engineers from around the world would agree Independent verification by that to craft the finest products there can be no I.A.B.G. Stuttgart - Germany substitute for using the finest raw materials. The Storm programme uses 17.4PH Stainless Steel known for its excellent mechanical and media compatibility properties for both the sensing element and the union. By using similar metals, Senstronics has guaranteed a weld integrity that can withstand millions of continuous pressure cycles up to 2200 bar (33,000 psi). Advanced weld systems are used for our entire range of pressure transducers from 7 bar (100 psi) to 2,200 bar (33,000 psi). Automated Weld Wire and Pack Build Bonder Silcone Applied Head Cleaner Rotating Fixture Laser Weld Robot Cell 3 Robot 1 Robot 2 Component Feed Pressure Unions & Overmould Assembly Vision System Component Feed With Pattern recognition Sensor Elements for element alignment 400 per Hour mounted above rotating fixture Magazine Load Stack 8 9 Storm - out of sight is not out of mind Senstronics PCB Interconnection Internal build quality but don’t just take our word for it . . . The reliability of electronic assemblies is Temperature and vibration testing. dependent on the integrity of electronic connections. Here again, the Storm programme shows its total commitment to excellence. The sensing element is wire bonded to the interface PCB by aluminium wire with bond strengths of not less than 150 grams. The ASIC PCB connects to the interface PCB using gold plated pins and precision collet assemblies. The ASIC PCBs are soldered directly to the connector pins to minimise joints. Pin Collet Socket >100g vibration 10 11 Install Storm and have quiet nights Senstronics Electronics C. E. and beyond ASIC Specifications The Storm range of Transducers and Transmitters has been engineered to satisfy the most rigorous demands ASIC Family for EMC. As standard all Storm Name SEN-1000 Products are rated to at least 100 Volts per metre in accordance with Application Requirement Industrial Automotive EN61000-6-2 and EN61000-6-3. Output 1 (pressure) volts absolute, current, ratiometric ratiometric (typ: 0-5, 1-6, 0-10V, 4-20mA, 0.5-4.5V) (typ: 0.25-4.75V, 0.5-4.5V) Output 2 volts absolute, ratiometric N/A (temperature/pressure switch) (typ: 0-5, 1-6, 0-10V, 0.5-4.5V) Output Type analogue - infinite analogue - infinite Clock Freq. Internal RC oscillator 2MHz Internal RC oscillator 2MHz Operating Input Voltage Range 8-30V (voltage regulates when required) 5V +/-10% Over-voltage Protection 30V 16V Reverse-voltage Protection -30V -16V Memory (comms through output 1 pin) OTP OTP Output 1 Signal Linearisation 3-point 3-point * other calibrations available / digital output data format tbd In creating the Storm programme, Senstronics has made a significant investment into the design and development of its own range of high performance signal conditioning ASICs. This growing family of ASICs has been specifically engineered to maximise the potential of thin film sensing technology and to meet the foreseeable needs of our future customers. These include joint pressure and temperature, digital and canbus options. In house design control ensures a readiness to apply our ASIC design skills to those customer applications requiring something special. >100V/m 12 13 Storm specifications - plug, play and forget Senstronics Unique Features Storm 10/30 Canbus and digital outputs Transducer Specifications Pressure transmitters and transducers Many of our customers are already looking at ELECTRICAL future applications where digital outputs are Our standard pressure products offer industry Parameter Min Typ Max Units Comment desirable. Our software design engineers are fully leading total error bands of 1% inclusive of Supply Voltage (Vdd) 8 14 30 V Absolute voltage & current applications conversant with CAN 2OB and similar control temperature effects over 100˚C temperature span. Supply Voltage (Vdd) 4.5 5 5.5 V Ratiometric applications protocols. PWM and other digital formats can Offset Calibration Point (20˚C) -0.25 0 +0.25 %f.s. also be accommodated within the transducers Full-Scale Calibration Point (20˚C) -0.25 0 +0.25 %f.s. using the digital version of our ASIC. Storm 50 Power-on Response Time 10 ms Over-Voltage Protection 30 V Joint pressure and temperature transducers Reverse Voltage Protection -30 V TM Current Draw* <8 mA Voltage mode The TCAS and Thermotec technology which endows Short Circuit Current Protected indefinitely Senstronics sensor elements with their unique Resolution Infinite – analogue path, 12 bit digital temperature stability is based on the use of a compensation resistor placed in series with the Wheatstone Bridge. This presents us with the opportunity to produce dual pressure and The benefits of Senstronics' THERMAL temperature outputs, which can be fully conditioned technology, uncompromising Parameter Min Typ Max Units by our specially designed SEN-1000 ASIC design and build standards Thermal Operating Range -40 +125 ˚C and state of the art production Total Thermal Accuracy -0.5 0 +0.5 %f.s. per 100˚C processes are manifested in Storm 70 (available Q1,04) our transducer performance Thermal Hysteresis <0.05 %f.s. specifications. Pressure transducer with integral switch function We pride ourselves in There are applications in hydraulic control systems providing our customers with products which will exceed requiring a continuous pressure output in addition MECHANICAL their expectations for stability to an electric switch function. This can be Parameter Typ Max Units and performance, year in, accommodated easily by the use of a comparator Linearity <0.1 %f.s. year out. on the pcb within the transducer itself. Hysteresis <0.05 %f.s. Special design capabilities Whilst many of our Mechanical Stability competitors provide (After 10m f.s. pressure cycles) 0.1% %f.s specifications with some errors Senstronics is uniquely supported by our Static Over-Pressure+ x2 rated pressure range omitted (typically temperature Technical Centre with a dedicated team of Dynamic Over-Pressure+ x1.25 rated pressure range and drift effects), our aim is to software, electronic and mechanical design provide clarity in an Burst Pressure x6 rated pressure range unashamed manner. engineers. Our capabilities extend beyond Frequency Response (Resonance) >10kHz pressure transducer design and manufacture Pressure Response Time* Total error band inclusive of to complete control systems and transducer (For 10-90% ideal step function) <1 ms ALL errors is typically less than integration. We consider ourselves to be the 1% for both pressure and Internal ‘dead’ volume 0.2 cc temperature outputs. most vertically integrated pressure * with external 5k pull-down in voltage applications. transducer manufacturer in the world, able + with offset shift <±0.1%f.s. to address customer specific design projects. 14 15 Storm - FAQ’s - now ask us a hard one Senstronics Specifications Installation Circuits Typical Installation Criteria Vdd VOLTAGE APPLICATION - TRANSDUCERS Response Time <1 ms Pressure Vout Customer Parameter Min Typ Max Units Comment Sensor Supply RL Supply Voltage (Vdd) 8 30 V Absolute mode. Power-on Time 10 ms ‘Head-Room’ Vdd = Vout + 1.5V Q A Supply Voltage (Vdd) 4.5 5 5.5 V Ratio-metric mode. Output Absoluteness 0.2 %f.s. Absolute mode reference Vdd=15V Pull-up/Pull-down Resistor During calibration we use a standard set up 15 kOhms Ratiometricity 0.5 %f.s. Ratiometric mode reference Vdd=5V pull down resistor. Where this is incompatible with Output Impedance^ 68 –10% 68 68 +10% Ohms customer application circuits we can accommodate a wide Pull-Down Resistor (RL) 2.5k 5k O/C Ohms range of pull-up and pull-down resistors during calibration. Consult Sales for further details. ^ effect of external pull-down resistor removed at calibration. Current Draw In voltage mode max 8 mA CURRENT APPLICATION - TRANSMITTERS Pressure Customer Parameter Min Typ Max Units Comment Sensor Supply In current mode max 20 mA, min 3.5 mA Supply Voltage (Vdd) 8 30 V RL 4-20mA Maximum Load Resistor (RL) 0 1000 Ohms Reverse Polarity -30 V Humidity MIL-STD-833E Method 1004.7 Vibration MIL-STD-883E Method 2005.2 Condition A Mechanical Shock MIL-STD-883E Method 2002.3 Thermal Shock MIL-STD-833E Method 1011.9 Plastic Material Types PBT 30% GFR Weight Approx 50 g 16 17 Storm - flexibility limited only by imagination Senstronics Standard Options Pressure Union Pressure Range Electrical Connector Output Options Customer Specials G1/4 integral seal BAR PSI GDS 207 Typical Joint Pressure Output & Temperature* Specific Voltage G1/4 bonded seal 7100 M12 (cable option) 0-5V✔ Offsets 1/4 NPT male 10 150 AMP SuperSeal 1-6V✔ 1/8 NPT male 16 200 DIN 72585 0-10V✔ 7/16 UNF flare 20 300 Packard Metripack 0.5-4.5V Special Digital Designs ratiometric✔ M12 x 1.5 6g 35 500 Deutsch 4 pin 0.25-4.75 M18 x 1.5 70 1,000 Sicma II ratiometric✔ Differential Pressure 100 1,500 4-20mA Pressure only Our product range continues to grow. Consult sales for 160 2,000 Digital latest options - PWM✔ 250 3,600 Canbus 400 5,000 - 2.0B✔ 700 10,000 * The temperature output can be calibrated to suit your particular 1000 15,000 needs. Typical ranges are -40 to +140°C, -20 to +125°C and 0-85°C. 1600 20,000 1800 25,000 2000 30,000 2200 32,000 18 19 Senstronics Senstronics leading edge sensor solutions Where to find us! Company offices Representatives and Distributors (see website) Contact Information Senstronics America Senstronics UK Exclusive Partners for Senstronics Ltd, Senstronics Ltd, Peoples Republic of China 4307 Arley Place, Unit 3, Angels Close, Valrico, Florida, Newton Aycliffe, Storm FL 33594 Co Durham DL5 6BG, United States of America United Kingdom Tel: 813 571 0895 Tel: +44 (0)1325 328521 Tel: 010 68371188 Fax: 813 571 0909 Fax: +44 (0)1325 328504 Fax: 010 68768895 21