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Daviteq Gas Detection Technologies

Daviteq GHC Gas sensor module is intended for the automatic continuous measurement of hydrocarbons or carbon
dioxide concentration in the atmosphere. The sensor operating principle is based on NDIR technology, i.e. on selective
absorption of LED-produced infrared radiation by gas molecules. The differential dual wavelength method allows the
elimination of water vapor, optical elements contamination, and other non-selective hindrances influence.

It has ultra-low power consumption to allow it to be integrated with Wireless Devices such as Sub-GHz transmitter,
Sigfox transmitter, LoRaWAN transmitter, RS485 output transmitters, etc.

It can be calibrated with target gas like CH4, C3H8, C2H4, and C2H6...

Typical Applications: Flammable gas detection.

Sensor technology

LED-based NDIR

Gas sampling method

Diffusion

Sensor housing / Rating

SS316/SS304 housing with 316SS sintered filter / for Indoor use (buy the

optional accessory rain-guard for outdoor installation), Exd approval for

Zone 1 or Zone installation.

Target gas

CH4, CH4/CH4+C2H6, C3H8, C2H4,... please consult us for other HC gases

Ambient Humidity

0 - 98%

Temperature

-40 .. + 60 oC

Atmospheric pressure

80 .. 120 kPa

Warm-up time

120 sec

Measurement range, % vol.

0 .. 5% vol. CH4, 0 .. 100% vol. CH4, for other ranges please consult us

Reading Stability in +20 .. + 25 oC

± 0.1% vol. or ± 5% of readings (whichever is greater) for CH4

± 0.05% vol. or ± 5% of readings (whichever is greater) for C3H8

Zero Stability in +20 .. + 25 oC

for CH4: ± 0.1% vol. or ± 2% LEL

for C2H4: ± 0.1% vol. or ± 3.8% LEL

for C3H8: ± 0.05% vol. or ± 2.4% LEL

Response time T90

<= 30 sec (with sintered metal filter)

Sensor lifetime

>= 10 years

Calibration interval

Recommend recalibrating zero and span at least every 30 months

Detailed reading stability

Daviteq GHC Flammable Gas
Sensor - Measurement Principle

1. Introduction

1.1 Overview

1.2 Specification

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Содержание Lidar People Counter

Страница 1: ...Daviteq AC 5A Current Transducer Measurement Principle Daviteq Ultrasonic Level Distance Measuring Technologies Daviteq ULA Ultrasonic Level Sensor for Trash bin Daviteq Air Gas Flow Measurement Techn...

Страница 2: ...Daviteq Optical Sensing Technologies...

Страница 3: ...t with two distinct fields of view FoV to alternatively get a ranging distance from them and consequently recognize the movements of a person Using this method the number of people occupying a meeting...

Страница 4: ...e sensor working properly The reliability of the algorithm relies on the accuracy of the setup which detects the distance between the sensor and the floor This can be ensured only if nothing e g no ob...

Страница 5: ...r facing down to the floor It can be used for the gate or walkway with dimensions as below Width is from 700 to 1500mm Height is from 2000 to 3500mm The sensor can count people passing thru the gate i...

Страница 6: ...nsor with optical lense PIR sensor with lense These 02 parts need to be checked and cleaned periodically depending on the environment ATTENTION DO NOT INSTALL THE SENSOR OUTDOOR OR INDOORS WITH HIGH I...

Страница 7: ...o distinguish between when people are present and when no one is standing under the sensor The laser sensor will measure the distance value from the sensor ceiling to the floor When there are people t...

Страница 8: ...Daviteq Radar Sensing Technologies...

Страница 9: ...Daviteq Gas Detection Technologies...

Страница 10: ...16SS sintered filter for Indoor use buy the optional accessory rain guard for outdoor installation What is cross sensitivity The electrochemical sensor is normally affected by other gas It meant the s...

Страница 11: ...over time For example the NH3 sensor current output will be reduced by about 5 of the signal per six months in clean air at 25 oC temperature The R_gain of the circuit also has a 0 1 or 0 05 tolerance...

Страница 12: ...wer ON the device Place the device in a clean air environment the target value is nearly zero at a temperature from 20 30 oC in at least 60 minutes It is better to use the 99 99 Nitrogen gas as zero g...

Страница 13: ...ased on basic linear formula y A x B Where A B is calibration coefficients x is the sensor process value example gas level in ppm read on reading device RAW_VALUE in the payload such as on application...

Страница 14: ...3 concentration in the ambient air Air quality monitor H2S H2S gas monitor for the sewage treatment system H2S gas monitor for indoor air quality H2S gas monitor for basement floor H2S gas monitor for...

Страница 15: ...may take up to 30 days to recover If the sensor cannot recover after 30 days please replace the new sensor module 2 The measured value is always zero or near zero 2 1 The sensor module was removed Pl...

Страница 16: ...ration sensor Please follow the calibration procedure in section 3 above Approx 6 12 months Sensor replacement Replace the new sensor module after 02 years of operation please check the sensor specifi...

Страница 17: ...reless delivers the proper output value Below are some configuration parameters that store in the flash memory of the wireless transmitter Description Unit Default Format Property Comment CONSTANT_A 1...

Страница 18: ...ampling method Diffusion Sensor housing Rating SS316 SS304 housing with 316SS sintered filter for Indoor use buy the optional accessory rain guard for outdoor installation Exd approval for Zone 1 or Z...

Страница 19: ...40 60 C C3H8 0 05 vol or 5 of readings whichever is greater within the range of 20 25 C 0 1 vol or 30 of readings whichever is greater at 100 kPa test 80 kPa 100 kPa 120 kPa 0 1 vol or 15 of readings...

Страница 20: ...gas molecules at a particular wavelength causing vibration of the gas molecules NDIR Non Dispersive Infrared gas sensors detect a decrease in transmitted infrared light which is in proportion to the...

Страница 21: ...f molecular vibration The relationship between infrared transmittance and gas concentration is expressed by the Lambert Beer law Where is transmittance is the intensity of light passed through sample...

Страница 22: ...ce the device in a clean air environment the target value is nearly zero at a temperature from 20 30 oC in at least 60 minutes After 60 minutes force the device to send data read and record the Raw_va...

Страница 23: ...r process value example gas level in ppm read on reading device such as on application server network server on offline tool The process value is the RAW_VALUE in the payload y is the correct value y...

Страница 24: ...cautions when operating electrical equipment intended for use in explosive areas in due course When dealing with a cylinder containing a gas mixture under pressure it is necessary to follow safety reg...

Страница 25: ...ment What How When Cleaning the Filter Check and clean the filter every few months depending on the environment Clean the filter with warm water and soap then use compressed air to purge it from the i...

Страница 26: ...output value Below are some configuration parameters that store in the flash memory of the wireless transmitter Description Unit Default Format Property Comment CONSTANT_A 1 Float R W Constant a for s...

Страница 27: ......

Страница 28: ...the same value for all sensors after manufacturing The sensor current output of a sensor will be changed over time For example the NH3 sensor current output will be reduced by about 5 of the signal pe...

Страница 29: ...on cap as above pictures to attach to the sensor and connect the tubing to the gas cylinder Open the valve on the Cylinder slowly and make sure the gas has reached the sensor Please use the Flow regul...

Страница 30: ...cture Because the Output is 0 10VDC we do recommend to use the following cable for extention Cable size minimum 24AWG or minimum 0 5 mm2 core Cable type Shielded Max recommended cable legnth 20m Note...

Страница 31: ...Connect the wires to Reading device as below PWR 12 36VDC PWR GND OUT 0 10VDC OUTPUT NC Not used Plug the M12 connector to sensor Firmly tighten the M12 connection...

Страница 32: ...2 The sensor is at the end of its life Replace the sensor module 3 The voltage output is 0V or random noise 3 1 The wiring problem Check the wiring and connector M12 Check power supply 3 2 The sensor...

Страница 33: ...Approx 1 2 years Sensor replacement instructions Step 1 Remove the Protector by Rotate it anti clockwise Step 2 Unplug the sensor module Step 3 Remove the spring clip on the new sensor module Step 4 P...

Страница 34: ......

Страница 35: ...c m bi n u c gi tr kh ng ng nh t sau khi s n xu t T n hi u d ng i n ra c a c m bi n s thay i theo th i gian V d d ng i n u ra c a c m bi n NH3 s gi m kho ng 5 m i s u th ng trong kh ng kh s ch nhi t 2...

Страница 36: ...n i ng v i b nh ch a kh M van tr n b nh kh t t v m b o kh c l u th ng n c m bi n Vui l ng s d ng van i u p 0 25 LPM ho c 0 5 LPM B t u b m gi nh d u m c th i gian Sau 2 ph t ghi nh n i n p ra sau ghi...

Страница 37: ...u c Code A 4 l i nh h nh d i V thi t b xu t t n hi u 0 10VDC n n khuy n c o n n s d ng d y c p m r ng v i c i m sau Lo i d y c b c ch ng nhi u t i thi u 24AWG ho c l i t i thi u 0 5 mm2 Chi u d i d y...

Страница 38: ...C m u n i M12 v o c m bi n Si t ch t k t n i M12...

Страница 39: ...tra l i k t n i M un c m bi n v i bo m ch 2 2 C m bi n b h h ng Thay M un c m bi n 3 i n p ra lu n b ng 0 ho c b nhi u 3 1 L i u d y Ki m tra l i d y u n i v c p M12 Ki m tra l i ngu n c p 3 2 L i thi...

Страница 40: ...kh l u th ng d d ng v o module c m bi n b n trong gi p c m bi n o ch nh x c Vui l ng xem h ng d n b n d i Sau kho ng 3 6 th ng Quy tr nh thay th m un c m bi n B c 1 Th o t m b o v b ng c ch v n ph n v...

Страница 41: ...h nh x c kh ng kh m i tr ng xung quanh B c 1 Th o v b o v b ng c ch v n ph n v ng c chi u kim ng h B c 2 D ng bao nylong v d y thun d y chun b c l i m un c m bi n ch ng n c v h i m th m nh p v o u c m...

Страница 42: ...B c 3 V sinh ph n v b o v b ng n c v kh n n m b o v b o v kh r o ho n to n sau khi v sinh B c 4 Th o bao nylon v l p l i v b o v b ng c ch v n theo chi u kim ng h END...

Страница 43: ...Daviteq Electrical Sensing Technologies...

Страница 44: ...eless transmitter of Daviteq It can connect to any brand of CT on the market The AC current from CT will go thru a precision resistor to convert to voltage value in mV then the electronics circuit wil...

Страница 45: ...The Daviteq AC current transducer can connect to any Wireless transmitters manufactured by Daviteq which support DULP output DULP Digital Ultra low Power...

Страница 46: ...the CT ratio in the wireless transmitter part The Daviteq AC current transducer is designed and manufactured with accuracy The user can do re calibrating the transducer by using an AC current calibrat...

Страница 47: ...e threshold for protection for safety From the current load the sensor can count the run time of the machine equipment to deliver output how many hours of run and how many hours of OFF by setting the...

Страница 48: ...Connect the AC transducer to the wireless transmitter via the M12 connector Make sure the connection is firm and tight as in below photo 5 2 Connect the AC transducer to Wireless Transmitter...

Страница 49: ...ation of CT in the wireless transmitter again 2 2 Loosed connection of M12 connector of the transducer and wireless transmitter Check whether the M12 connector is firmly connected 2 3 Wrong A and B va...

Страница 50: ...me configuration parameters that store in the flash memory of the wireless transmitter Description Unit Default Format Property Comment CONSTANT_A 1 Float R W Constant a for scaling measured value CON...

Страница 51: ...Daviteq Ultrasonic Level Distance Measuring Technologies...

Страница 52: ...re the time difference between the sound wave from the transmitting transducer and the receiving reflected sound wave From that it calculates the distance by the following formula D Time x V 2 Where D...

Страница 53: ...25 80 oC 0 99 RH non condensing Accuracy at 25 oC 65 RH 1 cm 0 5 of reading value Transducer material Ceramic Rating IP68 1m of water depth in 1h The Daviteq ULA ultrasonic level sensor measures the...

Страница 54: ...h bin or actual measurement Method 2 Read the sensor s measurement value when the trash bin is empty L0 Then H L0 How to determine the new coefficients A and B The calibration formula is L a x D b Cal...

Страница 55: ...es Clean the transducer surface with a soft detergent and clean water 2 The distance value always shows 450 500 cm 2 1 The object is too far away from the sensor it is out of the detection range of th...

Страница 56: ...d to do maintenance However depending on the installation environment the transducer must be checked and cleaned periodically for accurate measurement This ULA Ultrasonic level sensor has the default...

Страница 57: ...Thermal mass flow Pitot tube Orifice plate Daviteq Air Gas Flow Measurement Technologies...

Страница 58: ...1 There are 2 openings in the tubes one opening faces the flow directly to sense the stagnation pressure and the other is perpendicular to the flow to measure the static pressure Figure 1 Schematic of...

Страница 59: ...ith the Air please configure the Density of Fluid kg m3 of the gas in the device Please refer to the memory map in this link The Daviteq AFD Air Gas Flow Sensor together with a wireless transmitter to...

Страница 60: ...ndensation inside the sensor for accurate and reliable measurement Figure 3 Mounting direction of AFD flow sensor 5 1 Mounting Direction Notes The Arrow on the probe must be in the same direction of f...

Страница 61: ...es will cause errors in flow measurement Figure 6 Maximum misalignment To ensure a homogeneous flow profile it is necessary to mount the AFD flow sensor at a sufficient distance to narrow or bend of t...

Страница 62: ...specification of the flow sensor and wireless transmitter to ensure the complete set of devices is suitable for the process and environment of the installation Follow these steps Attach the nozzle wi...

Страница 63: ...Insert the probe into the flange neck and tighten the locking screw Figure 10 Install the probe into the rectangular duct Figure 11 The probe is completely installed on the rectangular duct Unscrew t...

Страница 64: ...Figure 12 Adjust the orientation of the probe 5 7 Attach the Wireless Transmitter to the probe...

Страница 65: ...evice vibrates during operation 2 1 Forget to tighten the screws during installation Recheck the installation 3 There is leakage of Air Gas nearby the installation 3 1 The leakage could be from the O...

Страница 66: ...on parameters that store in the flash memory of the wireless transmitter Description Unit Default Format Property Comment CONSTANT_A 1 Float R W Constant a for scaling pressure value in Pa CONSTANT_B...

Страница 67: ...Daviteq Inertial Measurement Technologies...

Страница 68: ...connection can be via a 2m cable with an M12 connector or integrated type WS433 only The V1A is also powered by the batteries in the wireless transmitter V1A utilizes the single axis Piezo accelerati...

Страница 69: ...or together with a wireless transmitter to be used in the following cases Measuring Single axis vibration and or surface temperature of Motor Bearing Pump Fan Gearbox Rotary machine equipment or any o...

Страница 70: ...surface temperature Here are some recommendations for the installation of V1A on some typical equipment based on standard ISO 20816 or ISO 10816 Figure 4 Measuring points for pedestal bearings Figure...

Страница 71: ...is an M6 screw that comes with the sensor as standard There are 02 cases of mounting The V1A can be installed directly on the equipment s surface via an M6 screw or an adapter if the threads on the e...

Страница 72: ...below figure Figure 12 Drilling and tapping an inner threads M6 on motor casing if the drilling is NOT allowed you can use the adhesive base Item code ACC V1A BASE 01 for mounting the V1A on the equi...

Страница 73: ...l Apply the 2 part putty epoxy on the bottom surface of the base Place the base on the surface Use the leveling meter to level the surface of the base in 02 directions X and Y LEAVE IT COMPLETELY DRY...

Страница 74: ...atus and replace it when necessary 2 The measured values are not as expected 2 1 The installation is not correct or not suitable for the sensor design Please recheck the installation 2 2 The sensor is...

Страница 75: ...ge the configuration on the wireless transmitter so that the complete sensor sensor wireless delivers the proper output values Below are some configuration parameters that store in the flash memory of...

Страница 76: ...d by the batteries in the wireless transmitter AG utilizes the three axis high accuracy MEMS acceleration sensor to calculate the static Euler angles of the object it is mounted on The microprocessor...

Страница 77: ...nearity 0 0622 o Total error in 20 oC deviation 0 075 o Parameter Measurement X tilt angle Y tilt angle Z tilt angle The Daviteq AG Tilt Sensor is calibrated at the factory We highly recommend custome...

Страница 78: ...ion direction is not correct Please recheck the installation 2 2 The sensor is drifting Please consult the manufacturer for a warranty or replacement 3 The reading values are very noisy even though th...

Страница 79: ...There is no configuration required for the AG tilt sensor There is only configuration for the Wireless transmitter please refer to the wireless transmitter s manual END 8 Default configuration...

Страница 80: ...Daviteq Pressure Measurement Technologies...

Страница 81: ...tra low Pressure Sensor Gas Flow Instrumentation Air Flow Measurement HVAC VAV Pressure Monitoring Negative Pressure Room Monitor Positive Pressure Room Monitor Filter Clogging Monitor Safety Cabinets...

Страница 82: ...6mm OD plastic tubes to connect to the H and L pressure ports of the sensor The mounting position must be chosen such that access to the Device is always possible Please take note of the specification...

Страница 83: ...to do maintenance However the pressure sensor will drift over time We do recommend customer to re calibrate it every 12 months This ULP Sensor has the default configuration The user can change the co...

Страница 84: ...e Measurement Technologies DEC 2022 Instructions for Grounding of Pressure Sensor CONNECTING GND FOR SENSOR Step 1 Open the blue housing of the sensor Step 2 Locate the GND point on the PCB same GND p...

Страница 85: ...Step 3 Solder a wire to this GND point the other end of the wire will be screwed to 1 of 2 screws on the aluminum base...

Страница 86: ...i Minh City Vietnam Step 4 Outside of the aluminum base there is another screw make a wire connection from this screw to the body of pressure sensor stainless steel cylindrical body Use a hose clamp o...

Страница 87: ...Tel 84 28 6268 2523 4 ext 122 Email info daviteq com www daviteq com...

Страница 88: ...Daviteq Soil Measurement Sensors...

Страница 89: ...eps fast measurement no reagents unlimited detection times It can also be used for the conductivity of water and fertilizer integrated solutions and other nutrient solutions and substrates The electro...

Страница 90: ...ency is detected by the frequency sweep circuit The dielectric constant of the soil can be measured so that the soil water content is obtained The dielectric constant of water is 80 F m 1 and the soil...

Страница 91: ...e sensor please pay attention to shading and protection when using it in the field Clean the soil surface by removing the debris and vegetation Insert the electrodes completely in the soil as in the b...

Страница 92: ...the manufacturer for a warranty or replacement 2 The measured values of EC Salinity and NPK are always zero or near zero 2 1 The soil moisture is too low less than 20 Therefore the circuit cannot mea...

Страница 93: ...ation on the wireless transmitter so that the complete sensor transducer wireless delivers the proper output value Below are some configuration parameters that store in the flash memory of the wireles...

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