2BVEF-MD-S261DIGITAL PRESSURE GAUGE

DIGITAL PRESSURE GAUGE MANUAL I. NOTICE III. DESCRIPTION V. DIMENSION VI. INSTALL VII. FUNCTION DESCRIPTION IV. SPECIFICATION II. WARNING Intelligent digital pressure gauge is a sophisticated pressure measuring product suitable for portable pressure measurement. This product adopts a main and auxiliary screen design, with the main screen displaying real-time pressure and the auxiliary screen switchable to display temperature, humidity, maximum value, minimum value and other data. The protection level is IP67. The product adopts Type-C external power supply and is equipped with Bluetooth function for convenient and quick debugging and parame- ter configuration. It is mainly suitable for use in inspection instruments, calibration instruments and other scenarios. Pressure range: Vacuum range: (0~-100) kPa Compound range: -0.1~0.1...1.0...2.5 MPa Micro pressure range: -100...-25...-5~2...5...25...100 kPa Conventional range: 0~0.16...10...60 MPa (See product label for details) Accuracy : See product label for details Power supply voltage: Lithium battery (rechargeable) or powered by 2 AAA batteries Contact method: Bluetooth Installation method: M20 * 1.5, G1/4 external thread, G1/2 external thread Dial size: 2.5 inch Data Configuration: Bluetooth configuration Data storage: 100W pieces Screen display mode: LCD screen (black background with white text) Joint material: 304 stainless steel Protection level: IP67 Operating temperature: (-10~60) ! Product damage caused by non-professional operations that are not in accordance with the operating instructions is not covered in the warranty. 1.When the ambient temperature is above 60”C, please use a forced fan or cooler for cooling. 2.The installation, debugging and maintenance of this product should be carried out by qualified engineering and technical personnel. 3.The product shell should be reliably grounded to help resist electromagnetic interference and ensure electrical safety. 4.If the fault or abnormality of this product may cause a major accident in the system, please set up an appropriate external protection circuit to prevent accidents. 5.The company is not responsible for any direct or indirect losses other than the product itself. 6.The company reserves the right to change product instructions without notice. Configurable to record up to 1 million data entries Low power consumption design Split-screen display on the main and secondary screens allows simultaneous display of multiple values Bluetooth connection debugging, compatible with SECA software, supports digital twins, enables parameter adjustment and data viewing at any time 5.1 Without protective cover7.1 Product Top Button Description 7.2 Quick function description under the Power Button( ) Note: 5.2 With protective cover 1.After receiving the product, please check whether the packaging and appearance are intact, and check whether the product model and specifications match the product you purchased. 2.Install and wire the product correctly and reliably according to the process connection, electrical connection and installation method provided by the product. 3.During use, please pay attention to the product's technical specifications and usage conditions, such as allowed medium and temperature, overload pressure, power supply voltage, etc. 4.The digital pressure gauge is a precision device. Users should not disassemble it by themselves when using it, and do not touch the diaphragm with hard objects to avoid damage to the product. 5.During the installation process, pay attention to protecting the product and do not install or disassemble it forcefully, otherwise it will easily damage the product, especially the installation thread. 6.Please use a suitable wrench when installing or disassembling. Do not forcibly twist the shell by hand to tighten or disassemble, otherwise the damage caused will not be covered by the warranty. 7.After installation and power-on test, it usually takes several minutes for the product to have stable output and normal operation. This is a normal phenomenon. 8.After power-on test after installation, if abnormal phenomena occur, please contact our company’s after-sales technicians unless you have the product adjustment equipment and skills. 9.It may be affected by installation stress during the installation process. After the installation is completed, if the reading is not at zero, please clear it before use. 111 Φ65 (Dial size) 44 Φ65 (Dial size) 114.5 50.5 Do not twist this area. 1.Before installing the device, please confirm if the installation space can accommodate the product. 2.Be sure to use an adjustable wrench when installing the pressure gauge. The wrench must complete the equipment tightening operation at the hexagonal position of the threaded interface to ensure airtightness. Do not directly fix the device by twisting other parts! 3.Please make sure to fully charge the product in advance and use the standard adapter and charging cable when charging. After on-site installation, ensure that the product has electricity before it can operate normally. Name power button settings key Power on Quick function switching Unit switching System Settings ButtonFunctionInstructions SET In the power on state: Short press the power button to quickly switch the display content and shortcut functions of the secondary screen, long press the power button for 3 seconds to shut down. In shutdown state: Short press to power on In startup mode: Short press to switch units, long press for 3 seconds to enter system parameter settings Quick Access maximum minimum Current temperature Zero clearing Record Full scale Current humidity Functional Description The MAX symbol lights up, and the secondary screen displays the current maximum value. The MIN symbol lights up, and the secondary screen displays the current minimum value. The °C or °F symbol lights up, and the secondary screen displays the current ambient temperature. %The symbol lights up, and the secondary screen di…

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MeokonSensorTechnology(Shanghai)Co.,Ltd CoveredEquipmentCertificationAttestationLetter 5/5/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa K1V1H2 Canada ATTN.:ReviewingEngineer FCCID:2BVEF-MD-S261 MeokonSensorTechnology(Shanghai)Co.,Ltd(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipmentprohibitedfrom receivinganequipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. MeokonSensorTechnology(Shanghai)Co.,Ltd(“theapplicant”)certifiesthat,asofthe dateofthefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListas anentityproducing“covered”equipment. MeokonSensorTechnology(Shanghai)Co.,Ltd(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtdoesnotincludecybersecurityoranti-virus softwareproducedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsand assignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886 andKDB986446D01CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:JianZhu Title:Engineer CompanyName:MeokonSensorTechnology(Shanghai)Co.,Ltd Date:5/5/2026

MeokonSensorTechnology(Shanghai)Co.,Ltd 5/5/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY-FCC FCCID:2BVEF-MD-S261 PursuanttoSections0.457(d)(1)(ii)and0.459oftheCommission’sRulesandFCCGuidance document726920,weherebyrequestconfidentialtreatmentofinformationaccompanyingthis applicationasoutlinedbelow: PERMANENTLONG-TERMCONFIDENTIALITY: Schematics BlockDiagrams TheoryofOperation Theaboveinformationcontainstradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthisinformationmightbeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors.TheApplicantunderstandsthatpursuanttoRule 0.457(d)(1)(ii),disclosureofthisApplicationandallaccompanyingmaterialswillnotbemadebefore thedateoftheGrantforthisApplication. Sincerely, Signed: Printedname:JianZhu Title:Engineer

FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261

LabelandLabelLocation

FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261 FCCID:2BVEF-MD-S261

Page1of2 RFEXPOSUREEVALUATION FCCID:2BVEF-MD-S261 StandardRequirement ProductName: DIGITALPRESSUREGAUGE ModelName: MD-S261 Operatingfrequency:2402-2480MHz NumbersofChannel:79channelsforBDR+EDR AntennaType:PCBantenna AntennaGain:-0.68dBi TypeofModulation:GFSK Powersupply: Input:DC5V Li-ionBattery:LR03 RatedVoltage:1.5V*2 HardwareVersion:V1.3 SoftwareVersion:V1.2.04 Page2of2 Accordingto§15.247(i)and§1.1307b(1),systemsoperatingundertheprovisionsofthis sectionshallbeoperatedinamannerthatensuresthatthepublicisnotexposedtoradio frequencyenergylevelsinexcessoftheCommission’sguidelines.SeeKDB447498D01 GeneralRFExposureGuidancev06,section4.3.1. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances≤50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]*[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gSARextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison. Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤ 50mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion. RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,usingmeasurements orcomputersimulation.WhenroutineSARevaluationisnotrequired,portabletransmitters withoutputpowergreaterthantheapplicablelowthresholdrequireSARevaluationtoquality forTCBapproval. Channel (MHz) Maximum output power (dBm) Tuneup tolerance (dBm) MaxTune UpPower (mW) Distance (mm) Calculation results Limit Operating Mode 2402 -2.24-2.24±1 0.75162350.2329793BLE_2M AccordingtoKDB447498,ThedeviceonlysupportBTfunction,andnosimultaneousSAR measurementisrequired. Signature SimonPu Manager Date:2026-04-16

Page1of68 FCCTESTREPORT FCCID:2BVEF-MD-S261 Product: DIGITALPRESSUREGAUGE ModelName:MD-S261 Brand: N/A ReportNo.: PTC26030206502E-FC01 Preparedfor MeokonSensorTechnology(Shanghai)Co.,Ltd 4thFloor,Building8,No.3236WaiqingsongHighway,BaiheTown,QingpuDistrict,Shanghai, China Preparedby PreciseTesting&CertificationCo.,Ltd Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong,China ReportNo.:PTC26030206502E-FC01 Page2of68 1TESTRESULTCERTIFICATION Applicant’sname: MeokonSensorTechnology(Shanghai)Co.,Ltd Address: 4thFloor,Building8,No.3236WaiqingsongHighway,BaiheTown, QingpuDistrict,Shanghai,China Manufacture'sname: MeokonSensorTechnology(Shanghai)Co.,Ltd Address: 4thFloor,Building8,No.3236WaiqingsongHighway,BaiheTown, QingpuDistrict,Shanghai,China Productname: DIGITALPRESSUREGAUGE Modelname: MD-S261 Standards:FCCCFR47Part15Section15.247 Testprocedure:ANSIC63.10-2020 TestDate:Mar.12,2026toApr.16,2026 DateofIssue:Apr.16,2026 TestResult:Pass ThisdevicedescribedabovehasbeentestedbyPTC,andthetestresultsshowthatthe equipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlyto thetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofPTC,thisdocument maybealteredorrevisedbyPTC,personalonly,andshallbenotedintherevisionofthedocument. TestEngineer: Jackzhou/Engineer TechnicalManager: SimonPu/Manager ReportNo.:PTC26030206502E-FC01 Page3of68 Contents Page 1TESTRESULTCERTIFICATION...............................................................................................................................2 2TESTSUMMARY..........................................................................................................................................................5 2.1TESTSITE............................................................................................................................................................6 3GENERALINFORMATION.......................................................................................................................................7 3.1GENERALDESCRIPTIONOFE.U.T.....................................................................................................................7 3.2CHANNELLIST.....................................................................................................................................................8 4EQUIPMENTDURINGTEST....................................................................................................................................9 4.1EQUIPMENTSLIST.............................................................................................................................................9 4.2MEASUREMENTUNCERTAINTY.........................................................................................................................11 4.3DESCRIPTIONOFSUPPORTUNITS...................................................................................................................12 5CONDUCTEDEMISSION..........................................................................................................................................13 5.1E.U.T.OPERATION............................................................................................................................................13 5.2EUTSETUP.......................................................................................................................................................13 5.3TESTSET-UP(BLOCKDIAGRAMOFCONFIGURATION).................................................................................14 5.4MEASUREMENTPROCEDURE............................................................................................................................14 5.5CONDUCTEDEMISSIONLIMIT...........................................................................................................................14 5.6MEASUREMENTDESCRIPTION..........................................................................................................................14 5.7CONDUCTEDEMISSIONTESTRESULT.............................................................................................................14 6RADIATEDSPURIOUSEMISSIONS......................................................................................................................17 6.1EUTOPERATION...............................................................................................................................................17 6.2TESTSETUP......................................................................................................................................................18 6.3SPECTRUMANALYZERSETUP..........................................................................................................................19 6.4TESTPROCEDURE.............................................................................................................................................20 6.5SUMMARYOFTESTRESULTS...........................................................................................................................22 7CONDUCTBANDEDGEANDSPURIOUSEMISSIONSMEASUREMENT....................................................30 7.1TESTPROCEDURE.............................................................................................................................................30 7.2TESTSETUP......................................................................................................................................................31 7.3TESTRESULT....................................................................................................................................................32 ReportNo.:PTC26030206502E-FC01 Page4of68 86DBBANDWIDTHMEASUREMENT......................................................................................................................45 TESTPROCEDURE....................................................................…

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ReportNo.:PTC26030206502E-FC01 Page58of68 12TestSetup ConductedEmissions RadiatedSpuriousEmissions TestFrequencyFrom30MHzto1GHz ReportNo.:PTC26030206502E-FC01 Page59of68 TestfrequencyfromAbove1GHz ReportNo.:PTC26030206502E-FC01 Page60of68 13EUTPhotos ReportNo.:PTC26030206502E-FC01 Page61of68 ReportNo.:PTC26030206502E-FC01 Page62of68 ReportNo.:PTC26030206502E-FC01 Page63of68 ReportNo.:PTC26030206502E-FC01 Page64of68 ReportNo.:PTC26030206502E-FC01 Page65of68 ReportNo.:PTC26030206502E-FC01 Page66of68 ReportNo.:PTC26030206502E-FC01 Page67of68 ReportNo.:PTC26030206502E-FC01 Page68of68 ******THEENDREPORT******

A N TE N N A S P E C I F I C A TI O N S u m m a r y I TE M AN T S P E C 2 . 4 G A N T M o d e l N a m e V e r t i ca l H o r i z o n t a l C e n t e r 2 4 0 0 M H z 2 5 00 M H z 2 4 0 0 M H z 2 5 0 0 M H z 2 4 5 0 M H z 2 4 5 0 M H z F r e q u e n c y - 1 . 7 3 - 6 . 15 - 2 . 3 2 - 0 . 8 4 - 0 . 6 8 - 3 . 7 0 M A X . G a i n - 0 . 6 8 P o l a r i z a t i o n H o r i z o n t a l a n d V e r t i c a l A z i mu t h B e am O mn i - di r e c t i o n a l P a t t e r n 5 0 O h m I m p e d a n c e 3 8 . 88 m m A n t e nn a L e n g t h M a n u f a c t ure A n t e n n a P h o t o & L en g t h ( mm ) M a n u f a c t u r e ' s n a m e : S h e n z h e n C h a n gy u E l ec t r o n i c T e c h n o l o gy C o . , L T D A dd r ess : 1 1 t h F l oor , D ax i n B u i l d i n g , N o . 2 066 , B ao a n S ou t h R oa d , L uo h u D i s t r i c t , S h e n z h e n C i t y

FCCID:2BVEF-MD-S261 ConductedEmissions RadiatedSpuriousEmissions From30MHz-1000MHz FCCID:2BVEF-MD-S261 TestfrequencyfromAbove1GHz