HAFUHM0100L4AXT

Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10 SLPM, 15 SLPM, 20 SLPM, 50 SLPM, 100 SLPM, 200 SLPM, 300 SLPM 008268 Issue 5 Datasheet DESCRIPTION Honeywell Zephyr™ HAF Series sensors provide a digital interface for reading airflow over specified full-scale flow and compensated temperature ranges. The thermally isolated heater and temperature sensing elements help these sensors provide a fast response to air or gas flow. Zephyr sensors are designed to measure mass flow of air and other non-corrosive gases. Standard flow ranges are 10 SLPM, 15 SLPM, 20 SLPM, 50 SLPM, 100 SLPM, 200 SLPM and 300 SLPM, with custom flow ranges available. The sensors are fully calibrated and temperature compensated with an onboard Application Specific Integrated Circuit (ASIC). The HAF Series >10 SLPM is compensated over the calibrated temperature range of 0°C to 50°C [32°F to 122°F]. The state-of-the-art ASIC-based compensation provides digital (I2C) outputs with a response time of 1 ms. These sensors operate on the heat transfer principle to measure mass airflow. They consist of a microbridge Microelectronic and Microelectromechanical System (MEMS) with temperature-sensitive resistors deposited with thin films of platinum and silicon nitride. The MEMS sensing die is located in a precise and carefully designed airflow channel to provide repeatable response to flow. Zephyr sensors provide the customer with enhanced reliability, high accuracy, repeatable measurements and the ability to customize sensor options to meet many specific application needs. The combination of rugged housings with a stable substrate makes these products extremely robust. They are designed and manufactured according to ISO 9001 standards. VALUE TO CUSTOMERS • Precise measurement: The industry’s smallest Total Error Band, fast response time, and high accuracy provide precise measurement and high performance in the customer’s application. • Saves time: Configurable and customizable with a choice of port styles simplifies design and reduces production time. • Cost-effective: Reduces printed circuit board (PCB) size and overall design and production costs. Sensing and Internet of Things FEATURES • Fast response time (1 ms) allows the customer’s application to respond quickly to a change in airflow, important in critical medical (e.g., anesthesia) and industrial (e.g., fume hood) applications. • High stability reduces errors due to thermal effects and null shift, providing accurate readings over time and often eliminating the need for system calibration after PCB mount and periodically over time. • High sensitivity at very low flows provides a fast response time at the onset or cessation of flow. • High 12-bit resolution increases the ability to sense small airflow changes, allowing customers to more precisely control their application. • Wide airflow range: The industry’s broadest airflow range measures mass flow with standard flow ranges of 0 to10, 0 to 15, 0 to 20, 0 to 50, 0 to 100, 0 to 200 and 0 SLPM to 300 SLPM, or custom flow ranges, increasing the options to integrate the sensor into the application. • Choice of port styles: Manifold mount, 22 mm OD tapered male fitting, and G 3/8 female threaded fitting provide flexibility to choose the pneumatic connection that is best for the customer’s application. • Linear output provides a more intuitive sensor signal than the raw output of basic airflow sensors, which can help reduce production costs, design, and implementation time. • Wide supply voltage range (3 Vdc to 10 Vdc) provides a flexible regulated power circuit which allows the designer the flexibility to choose the supply voltage that works best in the system. • ASIC-based I2C digital output simplifies integration to microprocessors or microcontrollers, reducing PCB complexity and component count. • RoHS-compliant materials Meet Directive 2002/95/EC. POTENTIAL APPLICATIONS • Medical: Anesthesia delivery machines, ventilators, ventricular assist devices (heart pumps), spirometers, laparoscopy • Industrial: Analytic instrumentation (spectrometry, chromatrography), air-to-fuel ratio, fuel cells, fume hoods, gas leak detection, process control gas monitoring, vacuum pump monitoring PORTFOLIO The Honeywell Zephyr Digital Airflow Sensors join an extensive line of airflow sensors for potential use in medical, industrial, and consumer applications. Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 1. Total Error Band vs. Accuracy Other airflow sensor manufacturers only report on accuracy, while Honeywell reports Total Error Band. Sources of Error Offset Full Scale Span Pressure Non-Linearity Accuracy BFSL Pressure Hysteresis Pressure Non-Repeatability Thermal Effect on Offset Total Error Band Thermal Effect on Span Thermal Hysteresis HIGH ACCURACY TOTAL ERROR BAND (TEB)* Ideal for use in demanding applications that require high Honeywell specifies TEB, the most comprehensive, clear, accuracy. and meaningful measurement that provides the sensor’s – 0%FS to 14.3%FS = 0.5%FS true accuracy (see Figure 1). TEB allows for precise airflow – 14.3%FS to 100%FS = 3.5%reading measurement, often ideal for demanding applications with high accuracy requirements for precise airflow measurement. • 10, 15, 20, 50, 100, 200 SLPM: – 0%FS to 12.5%FS = 0.5%FS – 12.5%FS to 100%FS = 4.0%reading • 300 SLPM only: – 0%FS to 12.5%FS = 0.5%FS – 12.5%FS to 66.7%FS = 4.0%reading – 66.7%FS to 100%FS = 7.0%reading Table 1. Absolute Maximum Ratings 1 Characteristic Parameter Supply voltage -0.3 Vdc to 11.0 Vdc Voltage on digital I/O output pins -0.3 Vdc to 3.0 Vdc2 Storage temperature range -40°C to 100°C [-40°F to 212°F] Maximum flow change 10,000 SLPM/s Maximum common mode pressure 4 bar | 60 psi at 25°C [77°F] Maximum flow 350 SLPM Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings. 1 Digital I/O pins are diode protected at this voltage up to 2 mA. Digital bus voltage may exceed this value if the maximum digital bus current is limited to 2 mA or less. The maximum bus current is generally determined by the bus pull-up resistors 2 CAUTION CAUTION Do not use these products to sense liquid flow. Failure to comply with these instructions may result in product damage. Do not dissamble these products. Failure to comply with these instructions may result in product damage. IMPROPER USE 2 Sensing and Internet of Things PRODUCT DAMAGE Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Table 2. Operating Specifications Characteristic Parameter Supply voltage 3 Vdc to 10 Vdc Supply current Power: 3 Vdc 10 Vdc Calibrated temperature range1 20 mA max. Operating temperature range -20°C to 70°C [-4°F to 158°F] Full scale (FS) flow 10, 15, 20, 50, 100, 200, 300 SLPM 2 60 mW max. 200 mW max. 0°C to 50°C [32°F to 122°F] Calilbrated flow range 0 to 10, 0 to 15, 0 to 20, 0 to 50, 0 to 100, 0 to 200, 0 SLPM to 300 SLPM Calibration gas Accuracy3 0%FS to 14.3%FS 14.3%FS to 100%FS clean, dry air Total Error Band:4 10, 15, 20, 50, 100, 200 SLPM: 0%FS to 12.5%FS 12.5%FS to 100%FS 300 SLPM only: 0%FS to 12.5%FS 12.5%FS to 66.7%FS 66.7%FS to 100%FS 0.5%FS 3.5%reading 0.5%FS 4.0%reading 0.5%FS 4.0%reading 7.0%reading Null accuracy5 ±0.5%FS Flow response time 6 1 ms Warm up time Resolution: 10 SLPM 15 SLPM 20 SLPM 50 SLPM 100 SLPM 200 SLPM 300 SLPM 35 ms Proof pressure 10.3 bar | 150 psig Burst pressure 13.7 bar | 200 psig Bus standards I2C fast mode (up to 400 kHz) 7 0.002 SLPM 0.003 SLPM 0.003 SLPM 0.008 SLPM 0.015 SLPM 0.029 SLPM 0.043 SLPM 8 Reverse polarity protection no Custom and extended temperature compensated ranges are possible. Contact Honeywell for details. 2 Honeywell standard for mass flow rate units is SLPM, which has reference conditions of 0°C and 1 atm. Custom units are given as LPM with listed reference conditions at the first mention. 3 Accuracy is the maximum deviation in output from nominal over the entire calibrated flow range at 25ºC. Errors include Offset, Full Scale Span, Linearity, Flow Hysteresis, and Repeatability. 4 Total Error Band (TEB) is the maximum deviation in output from nominal over the entire calibrated flow range and temperature range. Total Error Band includes all Accuracy errors, as well as all temperature effects over the compensated temperature range, including Temperature Offset, Temperature Span and Thermal Hysteresis. 5 Null Accuracy is the maximum deviation in output from nominal at null flow over the entire calibrated temperature range. 6 Response time: time to electrically respond to any mass flow change at the microbridge airflow transducer (response time of the transducer may be affected by the pneumatic interface). 7 Warm-up time: time to the first valid flow measurement after power is applied. 8 Refer to the Technical Note “I2C Communications with Honeywell Digital Airflow Sensors” for I2C protocol information. 1 Sensing and Internet of Things 3 Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Table 3. Environmental Specifications Characteristic Parameter Humidity 0% to 95% RH, non-condensing Shock 30 g, 6 ms Vibration 1,33 g at 10 Hz to 500 Hz ESD ESD IEC6100-4-2 air discharge up to 8 kV, or direct contact discharge up to 4 kV Radiated immunity: 20 , 50, 100 , 200, 300 SLPM 10, 15 SLPM Level 3 from 80 MHz to 1000 MHz per IEC61000-4-3 1 m shielded cable with 3 cm exposed leads at connector 1 m shielded cable with 3 cm exposed leads at connector and 280 Ohm at MHz ferrite bead Table 4. Materials Specifications Characteristic Parameter Wetted materials glass reinforced (GR) thermoplastic polymer, gold, silicon, silicon dioxide, silicon nitride, epoxy, PCB epoxy composite Housing GR thermoplastic polymer Substrate PCB Adhesives epoxy Electronic components silicon, gold Compliance RoHS, WEEE Table 5. Recommended Mounting and Implementation 4 Characteristic Parameter Mounting screw size 10-32 Mounting screw torque 1,13 N m [20 in-lb] Electrical connection 6 pin SIP connector Pneumatic connection manifold mount, 22 mm OD tapered male fitting, G 3/8 female threaded fitting Sensing and Internet of Things Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 2. Nomenclature and Order Guide1 For example, HAFUHM0020L4AXT defines a Honeywell ZephyrTM Airflow Sensor, unidirectional flow, long port, manifold mount, 20 SLPM, I2C output with custom 0x49 address, 10% to 90% transfer function, 3 Vdc to 10 Vdc supply voltage. HAF U HM 0020 L 4 A X T Product Series Flow Direction Port Style Flow Range Unit Output Format Transfer Function Reserved for Future Use Supply Voltage HAF Series— High Accuracy Airflow Sensor U Unidirectional HM Manifold mount HH HT 1 0010 10 L SLPM 2 Digital I2C address: 0x29 0015 15 3 Digital I2C address: 0x39 22 mm OD tapered male fitting per ISO 5356 0020 20 4 Digital I2C address: 0x49 0050 50 5 Digital I2C address: 0x59 G 3/8 female threaded fitting per ISO 1179 0100 100 6 Digital I2C address: 0x69 0200 200 7 Digital I2C address: 0x79 0300 300 A 10% to 90% of input X XXXXX T 3 Vdc to 10 Vdc Apart from the general configuration required, other customer-specific requirements are also possible. Please contact Honeywell. Figure 3. All Available Standard Configurations Manifold mount 22 mm OD tapered male fitting G 3/8 female threaded fitting Sensing and Internet of Things 5 Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 4. Nominal Digital Output: 10, 15, 20, 50, 100, 200, 300 SLPM 18018 16380 Digital Output (Counts) 14742 13104 11466 9828 8190 6552 4914 3276 1638 0 0 Full Scale Flow (%) 100 Figure 5. Accuracy and Total Error Band 300 SLPM only 4.00% 8.00% 3.00% 7.00% 2.00% 6.00% 1.00% 5.00% 0 TEB = 0.5% at 43 SLPM 2.00% -2.00% -3.00% 0 10 20 30 40 50 60 70 80 90 100 Ideal %FS Accuracy: 0%FS to 14.3%FS = 0.5% 14.3%FS to 100%FS = 3.5% Total Error Band: 0%FS to 12.5%FS = 0.5% 12.5%FS to 100%FS = 4.0% TEB = 7.00% at 300 SLPM TEB = 2.65% at 200 SLPM 3.00% -1.00% -4.00% TEB = 4.67% at 200 SLPM 4.00% Error (%FS) Error (%FS) 10, 15, 20, 50, 100, 200 SLPM 1.00% 0 -1.00% -2.00% -3.00% -4.00% -5.00% -6.00% -7.00% -8.00% 0 Ideal 10 20 30 40 50 60 70 80 90 100 %FS Accuracy: 0%FS to 14.3%FS (0 SLPM to 43 SLPM) = 0.5% 14.3%FS to 100%FS (43 SLPM to 300 SLPM) = 3.5% Total Error Band: 0%FS to 14.3%FS (0 SLPM to 43 SLPM) = 0.5% 14.6%FS to 66.7%FS (44 SLPM to 200 SLPM) = 4.0% 66.7%FS to 100%FS (200 SLPM to 300 SLPM) = 7.0% 6 Sensing and Internet of Things Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 6. Flow vs Pressure Drop: 10, 15, 20, 50, 100, 200, 300 SLPM Flow (SLPM) Pressure Drop (kPa) 20.684 17.237 13.790 10.342 6.895 Typical Pressure Drop mbar inH2O kPa 0 0.000 0.000 0.000 1 0.103 0.042 0.010 2 0.206 0.082 0.021 4 0.396 0.159 0.040 8 0.803 0.322 0.080 10 1.027 0.412 0.103 12 1.279 0.513 0.128 14 1.549 0.621 0.155 15 1.686 0.676 0.169 16 1.820 0.730 0.182 18 2.126 0.853 0.213 20 2.444 0.980 0.244 3.447 25 3.320 1.332 0.332 0.000 50 9.314 3.736 0.931 75 17.553 3.736 1.755 100 27.979 3.736 2.798 125 40.533 3.736 4.053 150 54.881 22.017 5.488 175 71.158 28.546 7.116 200 89.506 35.907 8.951 0 50 100 150 200 250 Flow (SLPM) 300 350 225 109.363 43.873 10.936 250 131.037 52.568 13.104 275 154.389 61.936 15.439 300 179.235 71.904 17.924 Table 6. Ideal Transfer Function Item Digital Output Code Flow Applied Equation 16384 * [0.1 + 0.8 * (Flow Applied/Full Scale Flow)] Full Scale Flow * [(Digital Output Code/16384) - 0.1]/0.8 Digital Interface For additional details on the use of Zephyr with digital output see the Technical Note “I2C Communications with Honeywell Digital Airflow Sensors”. The sensor uses the I2C standard for digital communication with a slave address specified in the Nomenclature and Order Guide in Figure 2. Following sensor power-up, each of the first two read sequences shown in Figure 7 will respond with 2 bytes of the unique 4-byte Serial Number. The first read after power-up will respond with the two most significant bytes of the Serial Number, while the second read will respond with the two least significant bytes of the Serial Number. For reliable performance, allow sensor to be powered for the sensor startup time before performing the first read, then allow a 10 ms command response time before performing the second read. Sensing and Internet of Things 7 Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 7. Sensor I2C Read and Write Sequences I2C Read: Slave responds to Master with data Data Byte 0 (Most Significant) SDA SCL Data Byte 1 (Least Significant) S A6 A5 A4 A3 A2 A1 A0 1 SA D7 D6 D5 D4 D3 D2 D1 D0 MA D7 D6 D5 D4 D3 D2 D1 D0 MN S I2C Read: Master sends data to Slave Command Byte SDA SCL S A6 A5 A4 A3 A2 A1 A0 1 SA D7 D6 D5 D4 D3 D2 D1 D0 SA S Bit Name Description S Start condition Master pulls SDA from high to low while SCL remains high S Stop condition Master allows SDA to float from low to high while SCL remains high Address bit I2C Slave Address is the 7 Most Significant Bits for the first transmitted byte Read/write bit Read = 1, Write = 0 A6 1 D7 Data bit Read = 1, Write = 0 SA Slave ACK Slave pulls SDA low MA Master ACK Master pulls SDA low MN Master NACK Master allows SDA to float high After the power-up read sequence described above, the sensor will respond to each I2C read request with a 16-bit (2 byte) digital flow reading. Read requests taken faster than the Response Time (1 ms) are not guaranteed to return fresh data. The first two bits of each flow reading will be ‘00’, while non-flow responses (such as error and status codes) will begin with ‘11’. There are several user commands available as shown in Table 8. Following an I2C write sequence of a user command, the sensor will respond to the next I2C read request with a 16-bit response. Possible responses to user commands can be seen in Table 9. Table 8. User Command Descriptions Command Byte (Hexadecimal) Command Name Command Description Command Response Time (Max.) 0x01 GetSerialNumber Next two read requests will each return two bytes of the sensor’s unique 4-byte Serial Number. 10 ms 0x02 PowerOnReset Force Power-On reset of sensor microcontroller. 20 ms Checksum Calculates EEPROM Checksum and compares to production Checksum value. If the values match, the next read request will respond with 0xCCA5. Otherwise, the next read will respond with 0xCC90. 1s 0x03 1 Table 9. Sensor Response Descriptions Sensor Response (Hexadecimal) Response Name Response Description 0xCCA5 POSACK non-response command was executed successfully 0xCC99 BadCommand command byte was not recognized 0xCC9A BadParam command sent with incorrect parameter bytes 0xCC9B Failure command failed during execution 0xCC90 BadChecksum checksum did not match stored value 0xCCBB Busy sensor is busy calculating the checksum value The maximum sink current on SCL or SDA is 2 mA. Therefore, if the pull-up resistors are biased by VDD, and if VDD reaches the maximum supply voltage of 6 V, then the pull-up resistors for SCL and SDA must be greater than 3.0 kOhm to limit the sink current to 2 mA. The typical value for SCL and SDA pull-up resistors is 4.7 kOhm (this value depends on the bus capacitance and the bus speed). 8 Sensing and Internet of Things Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 8. Mounting Dimensions (For reference only: mm [in].) Port Style: Manifold Mount 8 [0.3] Mounting Footprint 71,2 [2.80] 55,2 [2.17] 16,0 [0.63] 30,0 [1.2] 14,6 [0.58] 71,2 [2.80] 55,2 [2.17] 4X 5,60 [0.220] 30,6 [1.20] 4X 5,20 [0.205] A A 22,0 [0.87] 54,4 [2.14] 14,5 [0.57] 4X 15,0 [0.59] 16,0 [0.63] 44,0 33,0 [1.73] [1.30] 54,4 [2.14] 44,0 [1.73] 8 [0.3] B 63,2 [2.49] 4,0 [0.16] 51,5 [2.03] D 54 [2.1] 34,5 [1.36] 33 [1.3] 4X 4,50 [0.177] 42,4 [1.67] 22,0 [0.87] 4,0 [0.16] 2X 13,0 DIA. [0.51] 87 [3.4] A Pin 1. B 4X 10-32 pan head screws 1,13 N m [20 in-lb] torque. C 2X Gland for O-Ring AS568-113, 13,94 mm ID x 2,62 mm [0.549 in ID x 0.103 in W. Two O-rings, AS568A-113 Durometer A65 to A80 Silicon or Viton, are required to seal sensor to manifold. O-rings are not included. D Flow channel. C 87 [3.4] 63,2 [2.49] Port Style: 22 mm OD Tapered Male Fitting per ISO 5356 14 [0.6] 39,5 [1.56] 18,3 [0.72] Mounting Footprint 2X 5,70 [0.22] 21,0 [0.83] 14 [0.6] 14,8 [0.58] A 2X 5,20 [0.205] 14,5 [0.57] 39.5 [1.56] 14,8 [0.58] A 54,4 [2.14] 14,5 [0.57] 44,0 35,1 [1.73] [1.38] 44,0 [1.73] 54,4 [2.14] B 2X 21,0 [0.83] C 18,0 [0.71] 30 [1.2] 68 [2.7] 35 [1.4] 42,4 [1.67] 51,5 [2.03] 2X 4,50 [0.177] 68 [2.7] 2X 18,3 [0.72] 54 [2.1] A Pin 1. B C 2X 10-32 pan head screws 1,13 N m [20 in-lb] torque. 15 mm ID/22 mm OD tapered fitting per ISO 5356. 110 [4.3] Sensing and Internet of Things 9 Honeywell ZephyrTM Digital Airflow Sensors HAF Series—High Accuracy: 10, 15, 20, 50, 100, 200, 300 SLPM Figure 8. Mounting Dimensions (For reference only: mm [in], continued.) Port Style: G 3/8 Female Threaded Fitting per ISO 1179 16 [0.63] 39,5 [1.56] Mounting Footprint 2X 18,3 [0.72] 2X 1,5 [0.06] 16 [0.63] 2X 5,70 [0.22] 39,5 [1.56] 14,8 [0.58] 2X 1.5 [0.06] 14,8 [0.58] A A 2X 5,20 [0.205] 44,0 [1.73] 14,5 [0.57] 71 [2.8] 2X 18,3 [0.72] C 18,0 [0.71] 34,5 [1.36] 35 [1.4] 71,4 [2.81] 51,5 [2.03] 54 [2.1] 2X 4,50 [0.177] A Pin 1. B 2X 10-32 pan head screws 1,13 N m [20 in-lb] torque. C ISO 1179 G3/8, recommended torque is 1,7 ±0,6 N m [15 ±5 in lb]. Electrical connector part number is JST (Japan Solderless Terminals) B6B-PH-K-S. Mating connector part numbers are JST PHR-6 (socket) and JST SPH-002T-P0.5L (crimp terminal). 42,4 [1.67] Table 7. Pinout (Digital Function) 10 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 NC SCL VVDD ground SDA NC Sensing and Internet of Things 54,4 [2.14] 54,4 [2.14] B 30,0 [1.18] 44,0 35,1 [1.73] [1.38] 14,5 [0.57] ADDITIONAL INFORMATION The following associated literature is available on the Honeywell web site at sensing.honeywell.com: WARNING PERSONAL INJURY DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. • Product line guide • Product range guide • Technical Information – I2C Communications with Honeywell Digital Airflow Failure to comply with these instructions could result in death or serious injury. Sensors WARNING – Gas Media Compatibility and Correction Factors • Application Specific Information MISUSE OF DOCUMENTATION • • The information presented in this datasheet is for reference only. Do not use this document as a product installation guide. Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury. Warranty/Remedy Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship during the applicable warranty period. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgment or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items that Honeywell, in its sole discretion, finds defective. The foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. For more information Honeywell Sensing and Internet of Things services its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing or the nearest Authorized Distributor, visit sensing.honeywell.com or call: Asia Pacific +65 6355-2828 Europe +44 (0) 1698 481481 USA/Canada +1-800-537-6945 While Honeywell may provide application assistance personally, through our literature and the Honeywell web site, it is buyer’s sole responsibility to determine the suitability of the product in the application. Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this writing. However, Honeywell assumes no responsibility for its use. 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