Since its founding in 1931, Dwyer Instruments has established itself as an industry leader in the manufacturing of instrumentation solutions for the HVAC and Process Automation markets. Dwyer has a long history of innovation in designing and manufacturing its own measurement sensors that provide superior product performance, and their products are used every day in critical and essential processes around the world.
Dwyer delivers high value environmental solutions combined with the best experience in the industry for our customers and partners and is the premiere manufacturer and innovator of sensors that make up the heating, cooling, and ventilation systems used daily the world over. Dwyer manufactures quality products in the U.S.A.
Dwyer products and solutions improve the world – through the water we drink, the food we eat, the air we breathe, and the technology that we use.
Pressure
SERIES 2000 MAGNEHELIC® DIFFERENTIAL PRESSURE GAGES
Indicate Positive, Negative or Differential, Accurate within 1%
A versatile low differential pressure gauge with a wide choice of 81 models and 27 options to choose from. The design resists shock, vibration, over-pressures and is weatherproof to IP67. NIST Calibration is available.
- No Power Required
- Low Cost
- Used in Isolation/ Hospital Environments and Temporary Units (no power required)
NOTE: May be used with Hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.
- Filter Monitoring
- Air Velocity with Dwyer Pitot Tube
- Blower Vacuum Monitoring
- Fan Pressure Indication
- Duct, Room or Building Pressures
- Clean Room Positive Pressure Indication
Series DHC Digihelic® Differential Pressure Controller
3-in-1 Differential Pressure Controller possessing a digital display gauge, control relay switches, and a transmitter with both current and voltage outputs. Additionally, the Series DHC Digihelic® includes 2 SPDT control relays with adjustable deadbands. NIST Calibration is available.
- SCFM duct flow
- Filter status
- Duct or building static pressure
- Damper and fan control
Series 626 & 628 Industrial Pressure Transmitter
Complete offering of ranges, connections and outputs possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X (IP66) stainless steel general purpose housing or cast aluminum conduit housing. NIST Calibration is available.
- Compressors
- Pumping Systems
- Irrigation System Pressure
- Industrial Process Monitoring
- Hydraulic
Series 1900 Compact Low Differential Pressure Switches
Set Points from 0.07″ to 20″ w.c., Repetitive Accuracy within 3%
Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non-combustible compatible gases, Series 1900 switches have set points from 0.07 to 20″ w.c. (1.8 to 508 mm). Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved.
- Air conditioning refrigeration coil icing detection; defrost cycle initiation.
- Clogged filter detection.
- Variable air volume controller.
Series 1950 Explosion-Proof Differential Pressure Switch
Compact, Low Cost, Explosion-proof and Weatherproof
Combines the best features of the popular Dwyer® Series 1900 Pressure Switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed, FM approved for use in Class I, Div 1, Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres (NEMA 7 & 9), Raintight NEMA 3 (IP54).
- HVAC applications
- Process applications
- All-weather applications
Series DA/DS Bourdon Tube Pressure Switches
Pressure Ranges to 2500 psi (172.4 bar)
The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA Models are equipped with two external adjustments, one for setting the high pressure operating point, and the other for setting the low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full scale. The DS Models are equipped with a single external adjustment for setting the operating point only.
- Compressors
- Mechanical HVAC or process equipment
- Pump control
MSX SERIES MSX MAGNESENSE® DIFFERENTIAL PRESSURE TRANSMITTER
Monitors Differential Pressure, Air Velocity and Volumetric Flow
Pressure ranges are available in Pa, ‘mm w.c’., and ‘in w.c.’. All pressure ranges can be configured in unidirectional or bidirectional modes, providing a total of 32 ranges. The MSX Transmitter can provide a linear pressure output or a linear velocity output with the square root extraction from the transmitter. Dual voltage and milliamp output signals can be used to provide both control and equipment output signal verification.
FLOW
SERIES RM RATE-MASTER® POLYCARBONATE FLOWMETER
2″, 5″ or 10″ Scale, Interchangeable Bodies*
A line of general use, direct reading precision flowmeters suitable for both gas and liquid applications. This Series consists of 2″ (51 mm), 5″ (127 mm) and 10″ (254 mm) scales that can be panel or surface mounted with optional precision metering valves. NIST Calibration is available.
NOTE: The brass valve (-BV) option has been discontinued and the stainless-steel valve (-SSV) is the suggested replacement
- Medical equipment
- Air samplers
- Gas analyzers
- Pollution monitors
- Chemical injectors
- Cabinet purging
SERIES V6 FLOTECT® MINI-SIZE FLOW SWITCHES
Monitor Flow in 1/2″ to 2″ (12.70 to 50.80 mm) Pipe, Explosion-Proof, Compact
Specifically engineered to monitor liquid, gas, or air flows. This Series V6 Flotect® Mini-Size Flow Switch is Weatherproof, designed to meet NEMA 4 and Explosion-proof. Tees are available for installation in pipelines from 1/2″ to 2″ (12.70 to 50.80 mm). With bushings added the unit is easily adapted to 1/4″ and 3/8″ (6.35 and 9.53 mm) piping.
- Protects pumps, motors and other equipment against low or no flow
- Controls sequential operation of pumps
- Automatically starts auxiliary pumps and engines
- Stops liquid cooled engines, machines and processing when coolant flow is interrupted
- Shuts down burner when air-flow through heating coil fails
- Controls dampers according to flow
- Signals alarm when emergency shower or eyewash station is in use
SERIES V4 Flotect® Vane Operated Flow Switch
Field Adjustable – Dependable Protection Against Flow Variation or Stopping in Pipelines for Fluids, Gases and Flowing Solids
Rugged and reliable, ideal for automatically protecting equipment and pipeline systems against damage from reduction or loss of flow. This Series V4 Flotect® Vane Operated Flow Switch is Weatherproof, designed to meet NEMA 4 and Explosion-proof. This series can be used in pipes 1-1/2″ (38.10 mm) and up.
- Protects pumps, motors and other equipment against low or no flow
- Controls sequential operation of pumps
- Automatically starts auxiliary pumps and engines
- Stops liquid cooled engines, machines and processing when coolant flow is interrupted
- Shuts down burner when air-flow through heating coil fails
- Controls dampers according to flow
Series TDFS2 Thermal Dispersion Flow Switch
Non-Mechanical, Low Pressure Drop, Large Pipe Sizes
A Thermal Flow Switch that indicates whether the flow rate is above or below a user set flow rate. The unit incorporates two LED status indicators providing visual switch indication. The set flow rate (setpoint) is easily field adjustable with the included magnet and the unit has both NO and NC NPN outputs.
- Boiler flow proving
- Hot Water heaters
- Chillers
- Liquid transfer systems
LEVEL
Series PBLTX Submersible Level Transmitter
Perfect for Sludge and Slurries, Lightning Protected, Intrinsically Safe
Both measure the height of liquid above the position in the tank referenced to atmospheric pressure. Large diameter 316 SS diaphragm seal is non-clogging and damage resistant to floating solids.
Units come equipped with a 270-pound tensile strength shielded and vented cable. The ventilation tube in the cable automatically compensates for changes in atmospheric pressure above the tank. The vent is protected with a maintenance free filter eliminating particulate or water droplets from entering the transducer.
- Wastewater
- Sludge pits, clarifiers, digesters
- Alum tanks
- Chemical storage tanks
- Oil tanks
- Lime slurry
- Sumps
- Reservoirs
Series SBLTX Submersible Level Transmitter
Perfect for Ground Water and Wells, Lightning Protected or Intrinsically Safe
The Series SBLTX Submersible Level Transmitters are manufactured for years of trouble-free service. These series measure the height of liquid above the position in the tank referenced to atmospheric pressure. The transmitter consists of a piezoresistive sensing element, encased in a 316 SS housing.
SBLTX Compliance: cULus intrinsically safe for Class I, Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; Class III Div. 1;
- Well Monitoring
- Groundwater Monitoring
- Environmental Remediation
- Surface water Monitoring
- Down-hole
- Water Tanks
Series CFS2 Cable Float Switch
Mercury-Free, UL/CSA Approval Options
The CFS2 is perfect for simple level control of liquids for filling or draining reservoirs and tanks. Optional cables available include those with UL/CSA approval, higher chemical compatibility, high temperature durability, oil resistance, and drinking water suitability.
- Water level monitoring
- Tank level control
- High or low level alarm
- Municipal water control
- Industrial water control
- Filling or draining reservoirs and tanks
- Pump automation
TEMPERATURE / HUMIDITY
Process controllers and DIN rail temperature controllers monitor and control temperature, defrost, and fan cycles. Dwyer offers selections of transmitters, thermostats, digital panel mounts, limit switches, mechanical switches and thermometers available in dial, spirit filled, or digital.
Series 32B 1/32 DIN Temperature/Process Controller
Universal Input, Dual Temperature Output Control, RS-485 Communication
The compact Series 32B Temperature/Process Controller offers advanced control features for the most demanding temperature or process applications. Enclosed in a 1/32 DIN housing, the Series 32B is designed with dual, 4-digit LED displays for local indication of process value and setpoint. Control methods include ON/OFF, PID, self-tune, and manual tune. PID control is supported with 4 temperature and time (ramp/soak) control actions. The dual loop output control allows simultaneous heating and cooling control. The second output can be configured as an alarm mode using one of the thirteen built-in alarm functions.
RS-485 communications is standard on the Series 32B. Up to 247 communication addresses are available with transmission speeds of 2400 to 38,400 bps. The controller also features universal input, selectable temperature units (°F/°C), selectable resolution, quick sampling rate and security protection.
Series 16A Temperature/Process Controller
1/16 DIN, Universal Input, Fuzzy Logic, Self-Tune PID
Latest microprocessor based technology affords full programmability with a complete array of features in a compact ultra low cost unit. 16A Series Temperature/Process Controller features universal input, Self-Tune PID, Fuzzy Logic, and dual four-digit LED displays for process and set point value. Selectable inputs can be thermocouple, RTD, current or voltage. Available outputs are solid-state relay, relay, pulsed voltage, or proportional current programmable alarm (optional) can be reset automatically or manually. Front panel is waterproof and corrosion resistant (UL type 4X), making it ideal for sanitary applications. Replace electronics without wiring changes (via removable front panel). Self diagnostics, non-volatile memory and selectable control modes are all designed for greater productivity. Four security levels are password protected. On-off, P, PI or PID manual tune control functions can be selected or the controller will Self-Tune automatically for best PID control.
In addition to the features listed above, the 16A offers Peak/Valley indication, Percent Output indication, Digital Input Filter, and a host of others.
Series 8600 Temperature/Process Controller
1/8 DIN Self-Tune PID, Fuzzy Logic Software
Series 8600 Temperature/Process Controllers set a new standard for quality, ease-of-use and value. While a high level of standard features are included, many function setup items appear in the control menu only when the function is selected, so you don’t have to wade through unnecessary items. Units feature a universal input for thermocouple types J, K, E, T, L, N, B, C, S, & R; RTDs – 100Ω Plt. NIST, 100Ω Plt. DIN, 120Ω Ni Industrial, 1000Ω Plt. DIN; differential input (-10 to +10 mV DC) and process input (0 to 20 mA DC, 0 to 10 VDC). A standard 24 volt isolated, regulated power supply is included to operate most standard 4-20 mA transmitters.
Standard features include Self-Tune, Fuzzy Logic, fully adjustable PID, Auto/Manual control with bumpless transfer and front panel activation key, percent output indication, peak and valley indication, loop break protection and indication. For process inputs, the display is fully programmable from -1999 to +9999 with a selectable decimal point location. Most thermocouple and RTD inputs can show whole or tenth-degree displays. The Series 8600 is available with single or dual setpoint outputs and can be programmed for on/off, PID or heat/cool or latching alarm. All outputs are isolated from the inputs. Outputs include a 10 amp relay, 2.5 amp SSR and 0-20 mA DC (scalable). 15 VDC SSR drive is standard.
Series 4B 1/4 DIN Temperature/Process Controller
Dual Control Output, RS-485 Communication, Auto-Tuning
The Series 4B 1/4 DIN Temperature/Process Controller is designed to accept thermocouple, RTD, current or voltage input and provide dual outputs for control. Available outputs include relay/relay, voltage pulse/relay, current/relay, or linear voltage/relay.
The units can be programmed for ON/OFF, PID, auto-tuning, or manual tuning control methods. The PID control is supported by 64 ramp/soak actions. The Series 4B also includes two additional alarm outputs. The second relay output can be reconfigured as a third alarm output. The alarm type can be selected from 13 different preprogrammed alarm functions. The controller features dual LED displays for local indication of process and setpoint values.
Series SCD DIN Rail Temperature/Process Controllers
Universal Inputs, Up to 8 PID Loops, Modbus® Communications
The Series SCD DIN Rail Temperature/Process Controllers offer multiple PID loops in a compact size. Each SCD-1000 master controller can be combined with up to seven SCD-2000 slave controllers without any wires. Each controller has one universal input, one relay output and one user selected output.
Series TE Duct and Immersion Building Automation Temperature Sensor
Available up to 18″ Probe Length, Thermistor or RTD Outputs
The Series TE Duct and Immersion Temperature Sensor can be used to monitor air or water temperature throughout a building management system or an air handler unit. Flanged duct sensors monitor the supply or return air and provide a thermistor or RTD output to the digital controller. Immersion sensors which are supplied with compression fittings are typically used to monitor the hot or chilled water lines throughout a building. Thermowells are recommended, but not required on the immersion sensors.
For variable air volume applications, the Series TE can be configured to have an 8′ plenum rated cable with flying leads. Standard units come with 4″ leads with an integral terminal block to eliminate carrying extra wire nuts. For housing models, multiple knockouts provide easy conduit access to any side of the housing. The 1/4 turn lid comes with a chain to prevent it from being lost during installation.
Series RHP Humidity/Temperature Transmitter
Passive Temperature Outputs, Sintered Filter Options combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. Featuring polymer capacitance humidity sensors, models are available in 2%, 3% or 5% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display. NIST calibration is available
- Air economizers
- Outdoor temperature and relative humidity reference
- Pool room humidity monitoring
