DwyerOmega

Pressure, temperature, humidity, airflow, flow, level and gas detection instruments, matched to specific applications from data centres to refineries.

DwyerOmega brings together two long-established American instrument makers. Dwyer Instruments is known for differential pressure, airflow and HVAC measurement, including the Magnehelic® gauge. OMEGA Engineering is known for temperature sensors, process measurement and data acquisition. The group also includes FCI, SOR, Michell, Miljoco, Weiss and other specialist brands. Ronsor is authorised to supply the full DwyerOmega range.

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Start from the system you’re working on, for example a chiller plant, an isolation room or a lift station. Each application page shows every measuring point and the specific models suited to it. Not sure where to start? Try the Product Finder.

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All DwyerOmega models by product type

Air Velocity & Airflow Measurement

Automation & Control Components

Flow Meters

Dwyer CP-CN-CT-CX Coolpoint Vortex Meter; Water & Glycol

4-20mA, Solid State Relay Output; 316L SS & Brass Body; PEEK Sensor; FKM Seal

Dwyer FMG480 Series Magmeter with Integrated Display, Pulse & 4 to 20 mA Output

Economical flanged magmeter; 3‑12″ sizes; pulse & 4‑20 mA outputs

Dwyer FMG490 Series Magmeter w/Remote Display and Pulse & Optional 4 to 20 mA Output

Flanged magmeter with remote display; pulse & optional 4‑20 mA

Dwyer IEFB Insertion Thermal Energy Meter; Adj. 4"-36" Pipes

Current-Voltage-Pulse Outputs, Alarms; Optional BACnet & Modbus; 10', 20', 50' Sensor Leads

Dwyer Series IEF Insertion Electromagnetic Flow Transmitter

Accurate & Reliable Fluid Velocity Measurement; Flow 0-20 ft/s (0-6 m/s); Current, Voltage, Pulse Outputs; Alarms; Optional BACnet...

Dwyer Series LFM Flowmeters for GPM & LPM – 3 to 11 in – For Chill & RO Water Systems

Polycarbonate flowmeter with dual, direct reading scales measuring in both GPM and LPM, different scale lengths are available

Dwyer Series MM Custom Mini-Master® Flowmeters for Gas/Liquid, High Chemical Resistance

Series MMA is a 2" (51 mm) scale flowmeter, optional metering valve, high chemical resistance, can be easily disassembled for...

Dwyer Series RM Precision Flowmeters: 2", 5", 10" Scales, NIST Calibration available

General use, direct reading precision polycarbonate body flowmeters suitable for both gas and liquid applications

Dwyer Series VF Acrylic Flowmeters for Gas/Liquid, 2" & 4" Scales, NIST Options

Direct reading, precision machined, clear acrylic body flowmeters suitable for both gas and liquid applications

Dwyer Series-PFT Paddlewheel Flowmeters for Liquid Monitoring, Brass/316 SS, 4-20 mA Output

Paddlewheel Flowmeter for Liquids; IP67, Up to 25 ft/s

Omega Series AM-2250TX Multi-Variable pH, ORP, Conductivity & Flow Loop Powered Transmitter

Multi Variable Controller (pH, ORP, Contacting Conductivity, Flow); Two 4-20 mA Outputs; 3 Dry Contact Relay Outputs; NEMA 4X...

Omega Series FMG80A Low Flow Magmeter

Low Flow Electromagnetic Flow Meter; 1/4" to 3/4" Pipe Tube; 4-20 mA & Pulse Output; Chemical & Corrosion Resistant; IP66 (NEMA...

Omega Series FTB Turbine Flow Meter

Hard-alloy thrust bearing for accuracy and wear resistance; rugged, easy install; low minimum flow; low pressure loss; high...

Flow Switches

Gas Detection & Oxygen Analysers

AII GPR-7100 Hydrogen Sulphide (H2S) Analyzer

4-20 mA analog output; Hazardous Area certified

AII GPR-7500 (A)IS Hydrogen Sulphide (H2S) Analyzer

certified for use in flammable gas streams; 4-20 mA output, 0-2000 ppmV

AII Ultra Trace (ppb) Oxygen Analyzer - AII (Analytical Industries Inc) PI2-MS

Provides Accurate, Stable, and Dependable Oxygen Readings at Both ppb and Low ppm Levels

Dwyer Series CMS300 Carbon Monoxide Transmitter & Switch (0 to 300 PPM)

Selectable Current or Voltage Output; Jumper Selectable SPDT Relay Contact

Dwyer Series CMT200 Carbon Monoxide Transmitter (0 to 200 PPM)

Selectable Current or Voltage Output, Electrochemical Sensor

Dwyer Series GSTA/GSTC Carbon Monoxide & Nitrogen Dioxide Gas Transmitters

Electrochemical Sensor; Universal Current & Voltage Outputs; Optional Modbus & BACnet Communications & Display

Dwyer Series GSTA/GSTC-D Carbon Monoxide & Nitrogen Dioxide Duct Mounted Gas Transmitter

Electrochemical Sensor; Universal Current & Voltage Outputs; Optional Modbus & BACnet Communications & Display

Dynament FGD10A Flameproof Fixed Gas Detectors

Ex d gas detector with 3 alarm relays; non-intrusive mag-pen menu; detects hydrocarbons, hydrogen, or toxic gases.

Dynament FGD10B Flameproof Fixed Gas Detectors

Ex d gas detector in IP65 aluminium / SS housing; accepts plug-in handheld configurator; detects hydrocarbons, hydrogen, or toxic...

Dynament Platinum Series - Hydrocarbon Infrared Gas Sensors

Platinum IR Hydrocarbon Sensor; Measures CH₄ from 0‑100%v

Dynament Standard Series - Hydrocarbon Infrared Sensors

Standard IR Hydrocarbon Sensor; 4-20mA output, Measures CH₄ from 0‑100%v

Humidity & Dew Point Instruments

Dwyer CDTR Carbon Dioxide, Humidity, Temp Transmitter

Wall/duct mounted; 0-2000/5000 PPM; Optional LCD & relay output

Dwyer CDTR CO2, Humidity, Temp Transmitter or Sensor

North American/European Enclosure; Wall/Duct Mount; Optional LCD & Relay

Dwyer CDTR CO2, Humidity, Temp Transmitter/Sensor

Wall/duct mounted; 0-2000/5000 PPM; Optional LCD & relay output

Dwyer RHP-E/N Wall Mount Humidity, Temp, Dew Point Transmitter

Outputs: 4-20mA, VDC, RTD, Thermistor; RH Accuracy: +/- 2%, 3%, or 5%; Optional LCD

Dwyer Series RHP-E/N Wall Mount RH/Temperature/Dew Point Transmitter

Wall Mount RH/Temperature/Dew Point Transmitter with Analog Current/Voltage RH & Dew Point Outputs; Active/Passive Temperature...

Dwyer Series RHPLC Wall Mount Humidity & Temperature Transmitter (No Display)

Analog Humidity & Temperature, Optional Thermistor, RTD or 3% NIST Certificate

Dwyer Series RHPX Humidity & Temperature Transmitter with Solar Radiation Shield

RH & Temperature Combo (Optional Absolute RH/Dew Point/Enthalpy); mA/VDC Output Signals; 2% & 3% Accuracy; Solar Radiation Shield

Dwyer Series RHPX Humidity and Temperature Transmitter

Measures RH/Absolute RH/Dew Point; 2% & 3% Accuracies; Passive Temperature Sensors; Indoor/Outdoor Enclosures

Dwyer Series RHPX Outdoor Humidity & Temperature Transmitter

RH & Temperature Combo (Optional Absolute RH/Dew Point/Enthalpy); mA/VDC Output Signals; 2% & 3% Accuracy; Outdoor Enclosure

Explosion Proof Moisture Transmitter - Easidew PRO XP

Explosion-Proof Moisture Transmitter; -110 to 20°Cdp; ±1°Cdp Accuracy; 2-Wire 4-20 mA; Rated to 450 bar

Michell CDP301 - Portable Dew-Point Tester

Self-contained rechargeable battery; ±0.5 ˚C (±0.9 °F) accuracy measurement

Michell Condumax II - Hydrocarbon Dew-Point Analyzer

0.5°C (0.9°F) hydrocarbon dew-point accuracy; for natural gas processing

Michell Easidew EA2 - Dew-Point Transmitter

Dew point or ppmV moisture content output; Accuracy ±2 °Cdp (±3.6°Fdp)

Michell High-Precision Chilled Mirror Hygrometer Michell S8000 RS

Offering Low-Drift Readings of Dew Point

Michell Intrinsically Safe Dew-Point Transmitter - Easidew I.S.

Intrinsically Safe Dew-Point Transmitter; -110 to 20°Cdp; ±2°Cdp Accuracy; 2-Wire Loop Powered; 316 SS Sensor

Michell Intrinsically Safe Field Display

Intrinsically Safe Field Display\t4-Digit 4-20 mA Loop-Powered Display; Optional Backlight & Dual Alarms; ATEX, IECEx, UKCA & FM;...

Michell QMA601 - Process Moisture Analyzer

Explosion proof; range of 0.1-2000 ppmv, Sensitivity 0.01 ppmv

Michell Self-Calibrating Trace Moisture Analyzer - Michell QMA401

Low Maintenance Quartz Microbalance Technology

Michell Ultra-Pure Moisture Hygrometers Michell Pura

Hygrometers For Trace Moisture in Pure Gases

Transmitter for Moisture Analysis - Michell Easidew PRO I.S.

Intrinsically Safe Moisture Transmitter; -110 to 20°Cdp; ±1°Cdp Accuracy; 2-Wire 4-20 mA; Rated to 525 barg

Level Switches

Dwyer F6/F7 Horizontal Mount Level Switch, Multi-Material

Open/Closed circuits; Water, oils & chemicals compatible; Through wall mounting

Dwyer LV600-Series Pump Up/Pump Down Level Control Float Switches (UL & CSA Approved)

1.5-100 ft CableLength; IP68 Enclosure; SPDT Contact; Rated to 75 PSI @ 21C (70F)

Dwyer Series F6-F7 Vertical Level Switches for Water, Oil & Chemicals

Liquid Level Switch for Water, Oil & Chemicals; Reed Switch; Reversible Switch Action; Hermetically Sealed; Optional Float...

Dwyer Series L10 Mini Brass & Stainless Steel Float Switches for Liquid Control

Magnetic Reed Switch; Side Mount; N/O or N/C Selectable Contact; Optional Float/Body Materials; IP66 (NEMA 4X)

Dwyer Series L8 Flotec Liquid Level Float Switches

General Purpose applications; Horizontal Mount; Excellent Chemical Resistance; SPDT Snap Switch; Optional Weatherproof Enclosure

Dwyer Series-CFS2 Liquid Level Control Float Switch & Pump Control (CE, UL/CSA Approved)

10-70 ft Cable Length; IP68 Enclosure, SPDT or SPST N/O or N/C Contact, Rated to 14.5 PSI (1 Bar)

Dwyer Series-FSW2 Cable Float Level Switch

10-100 ft cable length; IP68 enclosure; SPDT or SPST N/O or N/C contact; rated to 29 PSI

Dwyer Series-L4 Magnetic Float Switch for Tank Level Control – No Moving Parts

Magnetic float switch; leak‑proof body; SPDT; detects tank high/low level

Dwyer Series-L6 Compact Flotect® Level Switch – Magnetic Actuation for Liquid Control

Compact liquid level switch; SPDT; installs in-wall; up to 2000 psig

Omega Series LVN10-20 Vertical Mounted Liquid Level Switch

Liquid Level Switch; Reversible Switch Action; Reed Switch; IP68 (NEMA 6) Rating; Brass Stem; BUNA-N Float Material

Omega Series LVN90 Side Mount Liquid Level Switches

Sealed SPST Switch; Side Mount; N/O or N/C Selectable Contact; Optional Float/Stem Materials; IP68 (NEMA 6)

Omega Series LVSW-701 Single Point Ultrasonic Liquid Level Switch

Single Point Ultrasonic Level Switch; 316 Stainless Steel; Mounts in any Direction; SPDT Selectable contact; 1A switch Rating

Omega Series LVSW-710/720 Compact Ultrasonic Point Level Switch

Solid State Liquid Level Switch; Small Size; N/O SPST Relay, 1A Switch Rating; 316L SS Wetted Materials

Omega Series LVU150 Submersible Ultrasonic Level Switch

Submersible Ultrasonic Level Switch; Selectable SPST N/O or N/C Relay; 1A Contact Rating; IP68 (NEMA 6)

Omega Series LVV110 Vertical Buoyancy Level Switch Sensors

Filling Baffle with Self Flushing Design; Sealed SPDT N/O or N/C Selectable Contact; Eliminates Surface Chatter; IP68 (NEMA 6)

Liquid Analysis (pH, ORP, Conductivity, DO)

Particle Analysers & Air Quality Monitors

Pressure & Differential Pressure Gauges

Dwyer 2000-HA High Accuracy Magnehelic Differential Gauge

Monitors Air/Non-Corrosive Gas; Positive, Negative/Vacuum or Differential; FS Accuracy +/- 1-2%

Dwyer DM-1000 Digital Differential Pressure & Flow Gages

Monitor Pressure or Air Flow; Air & Compatible Gases; Accuracy +/- 1% or 2% (Range Dependent); Supply: 9V Battery or 9-24 VDC

Dwyer Series 2-5000 Minihelic II Differential Pressure Gage (2 19/32" (65.88 mm) Diameter)

Monitors Air & Compatible Gases; Pressures Include: Positive, Negative, Vacuum or Differential; Accuracy +/- 5%

Dwyer Series 2000 Magnehelic Differential Pressure Gages (4 1/2" / 114.3 mm Diameter)

Monitors Air & Non-Corrosive Gas Pressure; Positive, Negative or Vacuum, Differential; FS Accuracy +/- 2%, 3% or 4% Range...

Dwyer Series DH Digihelic 3-in-1 Differential Pressure Controller

Digital Display Gage, Control Relay Switches & Transmitter Current/Voltage Outputs, LCD Display, 1/8 DIN Panel Mount

Dwyer Series DHC Digihelic 3-in-1 Differential Pressure Controller

Digital Display Gage, Control Relay Switches & Transmitter Current/Voltage Outputs

Dwyer Series EDA Electronic Pressure Control, Weatherproof, Adjustable SPDT, LED, Backlit Display

Weatherproof Electronic Pressure Controller; Adjustable SPDT & LED Display

Dwyer Series SGZ 2.5" Pressure Gage (0-160 psi, 316 SS, 1/4" NPT)

0-160 psi; dual psi/bar scales; ±1.5% FS accuracy; 304 SS housing; 316L SS tube; 316 SS connector; 1/4" NPT

Miljoco P2598L 2.5" SS Glycerin-Filled Pressure Gauge

Vacuum, Compound, Pressure to 5000 PSI; 1/4" NPT bottom/back; +/-3-2-3% accuracy; ASME B40.100 Grade B

Miljoco P4098LY-SS Industrial Gauge

4" Stainless Steel; 1% accuracy 1A; Dry, Glycerine, or Silicone Fill

Miljoco P4520L Process Gauge

4 1/2″ Process Gauge; Accuracy: 1/2%, Grade 2A; Dry, Glycerin, or Silicone

Miljoco P6098LY-SS Industrial Gauge

6″ Stainless Steel Industrial Gauge 1A; Dry, Glycerine, or Silicone Fill

Miljoco Series 1300 Coil syphons for use with Gauges and Steam Lines

Steam Syphons; Welded Steel or Seamless Brass; 1/4" or 1/2" NPT Male Threads; Temperature and Pressure Ratings Model Dependent

Miljoco Series P4598L 4.5" Contractor's Bourdon Tube Pressure Gauge (Lead-Free Wetted Parts)

Stainless Steel Case; Many Pressure Ranges; Accuracy +/- 1% FS, ASME B40.1 Grade 1A; NSF & ANSI Certified

Miljoco Series PSF4098LY 4.5" Stainless Steel Silicone Filled Industrial Pressure Gauge

4″ liquid‑filled stainless ammonia gauge; -30–150 psi range; hermetic

PGH Industrial Pressure Gauges with Temperature Compensation

Heavy-Duty Pressure Gauge; 4.5" or 6" Dial; ±0.5% Accuracy; 316 SS Wetted Parts; Temperature Compensated

Series-UGY Process Pressure Gauges

Process Pressure Gauge; 4.5" Dial; ±0.5% Accuracy; Liquid-Filled; Resists Vibration, Pulsation & Shock

Weiss LF251 2.5" Liquid SS Gauge; +/-2% Accuracy; PSI/kPa

Vacuum, Compound, Pressure to 10,000 PSI; 1/4" NPT bottom mount; U-Clamp or Front Flange panel mount

Weiss LF442Z Liquid Filled Pressure Gauge, Zytel Nylon Case

4″ 316 SS Gauge; Vacuum/compound to 10 000 psi, 1 % Grade 1A accuracy.

Weiss NF402 Series 4" Industrial Gauge with 304 SS Stainless Steel Case

4″ stainless industrial gauge; liquid filled; 0‑1000 psi; 1 % accuracy

Weiss NF602 Dry Pressure Gauge, Stainless Steel Case

6″ SS Gauge; Vacuum/compound to 15 000 psi, 0.5 % Grade 2A accuracy (¼″ NPT).

Weiss Series 4CTS/4CTA Stainless Steel Stem or Surface Mounted HVAC Pressure Gauges

Pressure Ranges 0-15 to 0-300 PSI, 0- 30" HG VAC, -30-0-30 & -30-0-60 PSI; Conforms to ANSI B40.1 Accuracy Grade 1A% FS

Pressure Switches

Dwyer 1950G Explosion-Proof Differential Pressure Switch

One SPDT Relay; 1/8" FNPT; Weather Proof; Dry Gases

Dwyer Series 1831 DPDT Low Differential Pressure Switch

DPDT Switch & Manual Reset; Use in High Duct Static Cutout Installations

Dwyer Series 1900 Compact Low Differential Pressure Switch (SPDT Contact)

Monitors Air/Non-Combustible Gases; Set Point 0.07" to 20"wc (1.8 to 508 mm); +/- 3% Repeatability

Dwyer Series 1950 Explosion-Proof Differential Pressure Switch

SPDT 1C Relay; 1/8" NPT; Air/Non-Corrosive Dry Gases

Dwyer Series 3000MR/MRS Photohelic Switch/Gage

Combines Differential Pressure Gage with Low & High Set Points; NIST Cal Available

Dwyer Series ADPS (HVAC) / EDPS (Plenum Rated) Differential Pressure Switches (SPDT Contact)

Monitors Air & Non-Combustible Gases; Set Points 0.08" to 20"wc; +/- 3% Repeatability

Dwyer Series DX Wet to Wet Differential Pressure Switch; Use in most Gas/Water Based Solutions

SPDT Snap Switch; Contact Rating 5A @ 125/250 VAC, 5A Resistive @ 30 VDC; NEMAA 4X (IP65) Rated

Dwyer Series EDPS Adjustable Differential Pressure Switch

Easy pressure adjustment with gauge; Low cost for BAS/HVAC duct control; Relay contact for DDC integration; Filter monitoring,...

Dwyer Series-A1F OEM Weatherproof Pressure Switch, 316 SS, 15 A for Pumps & Motors

Weatherproof Pressure Switch; 316 SS, 15 A Contacts

Dwyer Series-A6 Durable Pressure Switches – Polyimide Diaphragm – 1/4 in NPT Male

Durable Pressure Switch; Polyimide Diaphragm, ¼" NPT

Dwyer Series-CXA Water Pump Pressure Switch, Easy Set Point, 1/4 in NPT, for Wells

Water Pump Pressure Switch; Tool‑Free Setpoint, ¼" NPT

Dwyer Series-DA Bourdon Tube Pressure Switches with External Adjustments for HVAC & Pumps

Bourdon Tube Pressure Switch; Field‑Adjustable for HVAC & Pumps

Pressure Transmitters

Dwyer 626/628 SS316L Industrial Pressure Transmitters

Monitors fluids & air; 626 +/-0.25% / 628 +/-1% accuracy; 4-20mA or VDC output; PSI, BAR, PSIA ranges

Dwyer Series 3100MP Smart Pressure Transmitter for Flow & Level

Push button Configuration; ±0.075% FS Accuracy; 100:1 Rangeability; 4-20 mA with HART®; Hazardous Location Rated

Dwyer Series 605 Magnehelic® Differential Pressure Indicating Transmitter

Visual Monitoring & Electronic Control; 4-20 mA Output; 10 to 35 VDC Supply Voltage

Dwyer Series 616KX Low Differential Pressure Transmitter (Small Size; Din Rail Mount)

+/- 0.25%, 0.5%, 1% or 2% Accuracy; Push Button Zero; 4-20mA & Selectable Voltage Output

Dwyer Series 645 Wet/Wet Differential Pressure Transmitters, ± 0.25% Accuracy, 4-20 mA

Wet/Wet Differential Pressure Transmitter; +/- 0.25% FS accuracy; 4-20 mA output; NEMA 4X/IP56 enclosure

Dwyer Series DM DigiMag® Differential Pressure Transmitter

Monitor Pressure Air & Compatible Gases; Accuracy +/- 1% or 2% FS; 4-20 mA Output

Dwyer Series DM-2000 Differential Pressure Transmitter (Optional Digit Display)

Use with Air & Compatible Gases; 4-20mA Output; Field Selectable Engineering Units

Dwyer Series IDPT Industrial Low Differential Pressure Transmitter

Critical Differential Pressure; Accuracy +/- 0.5% FS (Optional +/- 0.25% FS); 4-20 mA or VDC Output

Dwyer Series MSX Magnesense Differential Pressure Transmitter (Round)

Wall & Duct Mount; Differential Pressure & Velocity with Square Root Extractor; Accuracy +/- 1% FSO; Field Selectable Ranges &...

Dwyer Series MSX Pro Magnesense Differential Pressure Transmitter (Rectangular)

Wall & Duct Mount; Differential Pressure & Velocity w/ Square Root Extractor; +/- 0.5% FSO; Field Selectable Ranges & Outputs

Dwyer Series-3100D Smart Differential Pressure Transmitter, HART®, Hazardous Area

Smart Differential Pressure Transmitter; HART®, Hazardous Area Rated

Dwyer Series-3200G Explosion-Proof Pressure Transmitter, HART®, FM Approved, 100:1 Range

Explosion‑Proof Pressure Transmitter; ±0.075% FS High Accuracy

Omega PX3005K Sanitary, Rangeable, Pressure Transmitters with Display

Sanitary/CIP pressure transducer; Meets 3-A standards for food, beverage, dairy, pharma; IP67 316 SS enclosure; 5-digit display

Omega PX509-IS High Accuracy, Intrinsically Safe Pressure Transmitters

0.08% Accuracy; 4 to 20 mA Output with FM Intrinsically Safe Rating

Omega PX880 Industrial, Intrinsically Safe Pressure Transmitters

PX880\tIndustrial Pressure Transmitter; ±0.2% Accuracy; 4-20 mA Output; Welded 316 SS; FM & CSA Hazardous Location Approved"

Omega Series PX309 General Purpose Stainless Steel Pressure Transducers

Accuracies from +/- 0.10% to +/- 0.25% Best Fit Straight Line; 4-20mA or Voltage Output; PSI, BAR, PSIA, Vacuum, Compound Ranges

Omega Series PX409 Configurable, High Accuracy Pressure Transducers for Air, Gases & Fluids

Accuracy +/- 0.08% or 0.05% Best Fit Straight Line; 4-20mA or Voltage Output; PSIG, BAR, PSIA, Vacuum, Compound, Sealed Gage...

Omega Series PX409 High Accuracy Pressure Transducers

Accuracy +/- 0.08% or 0.05% Best Fit Straight Line; 4-20mA or Voltage Output; PSIG, BAR, PSIA, Vacuum, Compound, Sealed Gage...

Omega Series PX835 Intrinsically Safe Pressure Transmitters with ATEX Rating

Explosion & Flame Proof Rated; ±0.5% Accuracy; 4-20 mA Output; 316 SS Wetted Parts; cULus, FM & ATEX Approved

Process Controllers & Panel Meters

Sight Flow Indicators

Temperature Transmitters

Valves, Regulators & Positioners

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