1. Pressure Transmitters andSwitchesThe materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employeesas a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes.Furthermore, the Companys name, likeness, product names, and logos, included within these compilations may not be usedwithout specific, written prior permission from Dwyer Instruments, Inc. Copyright 2014 Dwyer Instruments, Inc.

2. OverviewMS2 Diff. Pressure Transmitter616 Diff. Pressure Transmitter629 Wet/Wet Diff. Pressure TransmitterDX Wet/Wet Diff. Pressure Switch 3. MS2 - IntroductionDifferential pressure transmitterUses the Hall Effect sensing technology of theoriginal Series MSMonitors Pressure, Air Velocity and Air FlowUses BACnet/Modbus Communications 4. MS2 - Key SpecificationsService: Air and non-combustible, compatiblegasesTypical Accuracy:1% FS for 0.25 (50 Pa), 0.5 (100 Pa), 2 (500 Pa),5 (1250 Pa), 10 (2 kPa), 15 (3 kPa), 25 (5 kPa)2% FS for 0.1 (25 Pa), 1 (250 Pa), and all bi-directionalrangesPressure Limits: 1 psi max., operation; 10 psiburst 5. MS2 - Key SpecificationsOutput Signals: 4 to 20 mA (2-wire), 0 to 5VDC, 0 to 10 VDC (3-wire)Enclosure Rating: IP66Mounting Orientation: Diaphragm in verticalpositionAgency Approvals: BTL, CE 6. MS2 - TechnologyUses Hall Effect sensing technologyUses magnetic sensing to detect pressureReliable long term performance 7. MS2 - FeaturesMultiple field selectable rangesCan be used for a variety of applicationsDont need to buy multiple modelsBoth English and Metric units can be selectedCan choose between voltage or current settingsCan be used with many different systems 8. MS2 - FeaturesModbus and BACnet availableTransmitters can be daisy chainedMS2 can be easily integrated into the rest of yourBAS 9. MS2 - ApplicationsDuct static pressureFan proving 10. 616- IntroductionDifferential pressure transmitterComes in several factory calibrated rangesSpan and Zero controls included for fine tuningand minor re-calibration in the fieldPurchase by differential pressure ranges 11. 616 - Key SpecificationsService: Air and non-combustible, compatiblegasesAccuracy: 0.25% FSOutput Signal: 4 to 20 mAZero and Span Adjustments: Potentiometersfor zero and spanAgency Approval: CE 12. 616 - FeaturesCompact housingIdeal for VAV systemsFine tuning and minor recalibration in the fieldEasy maintenanceMore accurate for a longer time 13. 616 - ApplicationsVariable air volume systemsFan speeds are adjusted based on pressure in ductsCan be used to check on status of air filters 14. 629 - IntroductionMonitors differential pressure of air and compatiblegases and liquidsSmall internal volume and minimum moving partsresult in exceptional response and reliabilityDesigned to meet NEMA 4X (IP66) construction3-way valve option available 15. 629 - Key SpecificationsService: Compatible gases & liquidsWetted Materials:Without valve: 316, 316L SSAdditional wetted parts with 3-way valve option:Buna-N, silicone grease, PTFE, brass 360, copper,reinforced acetal copolymerAccuracy: 0.5% FS (includes linearity,hysteresis & repeatability) 16. 629 - Key SpecificationsEnclosure Rating: Designed to meet NEMA4X (IP66)Agency Approvals: CEOutput Signal: 4 to 20 mA. Optional 0 to 5, 0to 10 VDC 17. 629 - FeaturesSmall internal volume and minimum moving partsExceptional response and reliabilityMinimal wear and tearTerminal block, zero and span adjustments easilyaccessibleEasy maintenance and recalibration3-way valve option available 18. 629 - ApplicationsMonitor differential pressures across:Flow elementsHeat exchangersFiltersPumpsCoils 19. DX - IntroductionDifferential Pressure Switch for waterGives us a low cost product to round out productoffering as an alternative to the H3 and DP 20. DX - Key SpecificationsTemperature Limits: -1 to 60 CEnclosure Rating: IP66Maximum Pressure: 13.8 barRepeatability: 2% of full rangeProcess Connection: 1/4 18 NPT FemaleWetted Materials: Brass and Viton (Option forBuna N) 21. DX - Key SpecificationsSwitch Type: SPDT snap switchElectrical Rating: 5A @ 125 VAC, 3A @ 250VAC, 4A @ 30 VDCElectrical Connection: Removable terminalblockConduit Connection: Hole for conduit hub,optional cable gland 22. DX - Key SpecificationsAgency Approvals: UL508, ULc, CESet Point Adjustment: External, hand adjustablehex head screwMounting Orientation: Vertical, 10 23. DX - RangesAdjustableRangebarFixed Deadbandbar0.17 to 0.69 0.10 to 0.170.69 to 1.72 0.17 to 0.241.38 to 3.45 0.24 to 0.413.46 to 5.17 0.41 to 0.55 24. DX - FeaturesPipe or flush mount with provided mountingearsWeatherproof constructionHigh static pressure ratingTight deadbandExternal set point adjustment 25. DX - ApplicationsWater FiltrationUsed to initiate backwash of thefilter. These can be bag filters,sand filters, and disc filters.Starts on increase of differentialpressure. Filters are varied inapplication from irrigationsystems to cooling towers. 26. DX - ApplicationsCoolant FiltersUsed to initiate backwash offilter. Starts on increase ofdifferential pressure.These are filters used to clean thecoolant used on machiningsystems. Cleans out the metalbits from the coolant. 27. DX Application: BASChillersProves flow of liquidfrom pump throughthe chiller.Often calledevaporator waterpressure drop. 28. DX Application: ChillerAll Trane units are pre-packaged with a vane flowswitch. The majority of integrators and installers feelthese are problematic and throw them away and use aDP switch or current switch.Trane variable flow pump units tend to use DPswitches as a current switch doesnt work as well onvariable speed driven pumps. 29. DX Application: BASAC Units or Heat PumpsUsed in buildings on the condenser waterloop that goes between the cooling toweron the roof to the AC unit in a particularzone in a building. Usually each floor hasone AC unit. Used in all high-rises. 30. DX Application: BASAC Units or Heat PumpsOften called a Condenser Water Lock-Out Switch.AC unit will freeze up if no flow through it.Heat Pump Manufacturers: Climate Master, Aon,Mammoth, Carrier, etc. 31. DX Application: BASKey for BAS applications is the low set point.They are trip on a decrease of DP, so the unitcan be set to .035 bar.Also key is tight deadband for early reset onincrease of pressure. 32. DX - ApplicationGeneral IndustryPump flow proving with DP across the pump.Flow proving with a flow element such as aventuri or an orifice plate.