Pumps, Compressors & Pump Skids Instrumentation

1

Low Flow & Dry Running Protection

Thermal dispersion and vane flow switches stop a pump before it runs dry or below its minimum flow, and confirm seal flush and cooling water flow.

FLT93 Thermal Dispersion SwitchFCI FLT93 heavy-duty thermal dispersion flow and level switch with no moving parts, for liquids, gases and interfaces in process plants.

Dwyer Series TDFS2 Thermal Dispersion Flow Switch (Non-Mechanical, Low Pressure Drop, Large Pipes)Measure Flow Above or Below User Set Flow Rate; Normally-Open & Normally-Closed NPN Outputs; LED Indication

Dwyer Series-V4 Flotect Flow Switches: Weatherproof, Explosion-Proof, Low Flow ProtectionDwyer V4 Flotect vane flow switch for pipes 1-1/2 in and up: weatherproof and explosion-proof, up to 5000 psig, for loss-of-flow protection in hazardous areas.

Dwyer Series V6 Flotect Mini size Flow Switch for 1/2" to 2" PipesDwyer V6 Flotect compact vane flow switch for liquids, gases and air in 1/2 to 2 in pipes: weatherproof and explosion-proof, up to 2000 psig.

Dwyer Series FS2 Vane Flow Switch for Boilers & Heaters, Adjustable 1-8 in PipesVane Flow Switch for Boilers/Heaters; Reliable Low‑Flow Trip

2

Pump Flow Measurement

Clamp-on ultrasonic, insertion magnetic, paddlewheel and energy meters measure pump output, and an elbow flow conditioner keeps the reading accurate close to bends. Clamp-on meters fit outside the pipe, so they can go on a running pump without a shutdown, and the portable version checks pump performance in the field.

Fixed MinisonicFaure Herman single-chord clamp-on transit-time ultrasonic flowmeter for liquids, with OLED display, 4-20 mA output, two contact outputs and a 1.8 GB data logger.

Uf821 Ultrasonic Fixed FlowmeterFaure Herman fixed clamp-on ultrasonic flowmeter for liquids: up to 4 measuring points per unit, accuracy to 0.5% of reading, on steel, PVC, cast iron or stainless pipes.

Portable Ultrasonic Flow MetersFaure Herman portable clamp-on ultrasonic flowmeter (Uf801P) for checking liquid flow on any pipe without cutting in: accuracy to 0.5%, multi-layer pipes, 11 stored set-ups.

Dwyer Series IEF Insertion Electromagnetic Flow TransmitterDwyer Series IEF insertion magmeter for 4 to 36 in pipes: 0–6 m/s, ±0.5% of reading at the calibrated velocity, analog, pulse and alarm outputs, BACnet/Modbus option.

Dwyer Series-PFT Paddlewheel Flowmeters for Liquid Monitoring, Brass/316 SS, 4-20 mA OutputDwyer PFT paddlewheel flow sensor for water-based liquids in 1-1/2 to 40 in pipes: one adjustable insertion sensor, pulse or 4-20 mA output, brass or 316 SS.

Dwyer IEFB Insertion Thermal Energy Meter; Adj. 4"-36" PipesCurrent-Voltage-Pulse Outputs, Alarms; Optional BACnet & Modbus; 10', 20', 50' Sensor Leads

VEL Flow ConditionerFCI VORTAB VEL elbow flow conditioner that replaces a 90° elbow and cuts the straight run needed before a flow meter to 3 pipe diameters.

3

Suction & Discharge Pressure

Pressure switches shut a pump down on low discharge pressure (for example when an unloading tank runs empty) and protect compressors, and transmitters send suction and discharge pressure to the control system to catch dry running and blockages early. Differential pressure switches protect gas compressors at start-up.

Big HermetSOR Big Hermet hermetically sealed, explosion-proof pressure switch for panel or wall mounting, 1 bar vacuum to 480 bar, with SIL and UL/CSA approvals.

Mini HermetATEX, UL/CSA, GOST, INMETRO, RTN, SIL; Snap Switch: ATEX, TestSafe (SAA), UL/CSA

Pressure and Vacuum SwitchesSOR piston-type pressure and vacuum switches, weatherproof or explosion-proof, from 1 bar vacuum to 480 bar, with ATEX, SIL and UL/CSA approvals.

Adjustable Dead BandSOR V3 explosion-proof pressure switch with a wide adjustable dead band (5 to 1750 psi), for pump and compressor control with fewer on/off cycles.

800 Series Smart Pressure TransmitterSOR 800 Series smart pressure and differential pressure transmitters (805PT, 805QS, 815DT, 815PT): compact and loop powered, for hazardous areas.

1800 Series Differential Pressure / Pressure TransmitterThe 1800 Series Differential Pressure Transmitter model DMP305X-DST-S is well suited for intrinsically safe applications or conventional transmitter installations where a compact footprint is impractical.

Dual Opposed DiaphragmSOR S-housing explosion-proof differential pressure switch with opposed pistons, 0.5 to 1000 psid, best where system pressure is fairly constant.

Dwyer Series-3200G Explosion-Proof Pressure Transmitter, HART®, FM Approved, 100:1 RangeDwyer (Mercoid) 3200G explosion-proof smart gauge pressure transmitter: ±0.075% accuracy, 100:1 turndown, HART, ranges to 8500 psi, FM approved.

Omega PX880 Industrial, Intrinsically Safe Pressure TransmittersOmega PX880 industrial pressure transmitter in welded 316 SS: ±0.2% accuracy, 4-20 mA, 5:1 turndown, FM and CSA intrinsically safe and explosion-proof.

Dwyer 626/628 SS316L Industrial Pressure TransmittersDwyer 626/628 industrial pressure transmitters with 316L stainless wetted parts: 626 ±0.25% or 628 ±1% full scale, 4-20 mA or voltage output, NEMA 4X.

Omega Series PX309 General Purpose Stainless Steel Pressure TransducersOmega PX309 all-stainless pressure transducers: 0–1 to 0–10,000 psi, gauge, absolute, compound or vacuum, ±0.25% accuracy, mV, voltage or 4-20 mA output.

Omega Series PX409 High Accuracy Pressure TransducersOmega PX409 high-accuracy pressure transducers: ±0.08% BSL, 10 in H₂O to 5000 psi, mV, voltage or 4-20 mA output, 5-point NIST calibration included.

Dwyer Series EDA Electronic Pressure Control, Weatherproof, Adjustable SPDT, LED, Backlit DisplayWeatherproof Electronic Pressure Controller; Adjustable SPDT & LED Display

Dwyer Series-CXA Water Pump Pressure Switch, Easy Set Point, 1/4 in NPT, for WellsWater Pump Pressure Switch; Tool‑Free Setpoint, ¼" NPT

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

Dwyer Series-A6 Durable Pressure Switches – Polyimide Diaphragm – 1/4 in NPT MaleDurable Pressure Switch; Polyimide Diaphragm, ¼" NPT

Dwyer Series-DA Bourdon Tube Pressure Switches with External Adjustments for HVAC & PumpsBourdon Tube Pressure Switch; Field‑Adjustable for HVAC & Pumps

4

Filter & Strainer Differential Pressure

Differential pressure switches and transmitters alarm when suction strainers and compressor filters start to block.

Dwyer 1950G Explosion-Proof Differential Pressure SwitchOne SPDT Relay; 1/8" FNPT; Weather Proof; Dry Gases

Dwyer Series 1950 Explosion-Proof Differential Pressure SwitchSPDT 1C Relay; 1/8" NPT; Air/Non-Corrosive Dry Gases

Dwyer Series-3100D Smart Differential Pressure Transmitter, HART®, Hazardous AreaDwyer (Mercoid) 3100D explosion-proof smart differential pressure transmitter: ±0.075% accuracy, 100:1 turndown, HART, for flow, level and filter DP in hazardous areas.

5

Local Pressure Gauges

Liquid-filled process gauges show suction and discharge pressure at the machine and withstand pulsation and vibration.

Series-UGY Process Pressure GaugesSeries UGY 4.5 in liquid-filled process pressure gauge: ±0.5% accuracy, resists vibration, pulsation and shock, ranges to 20,000 psi.

PGH Industrial Pressure Gauges with Temperature CompensationPGH heavy-duty industrial process gauge, 4.5 in: ±0.5% full scale, 316 SS Bourdon tube and connection, temperature compensated, ranges 15 to 20,000 psi.

Weiss LF442Z Liquid Filled Pressure Gauge, Zytel Nylon CaseWeiss LF442Z 4 in liquid-filled pressure gauge in a Zytel nylon case with 316 SS internals: ±1% (Grade 1A), vacuum to 10,000 psi.

Miljoco Series PSF4098LY 4.5" Stainless Steel Silicone Filled Industrial Pressure GaugeMiljoco PSF4098LY-SS 4 in silicone-filled industrial pressure gauge, 316 SS wetted parts: ±1% (Grade 1A), for vibrating machinery and pump discharges.

Miljoco Series P4598L 4.5" Contractor's Bourdon Tube Pressure Gauge (Lead-Free Wetted Parts)Miljoco P4598L 4.5 in contractor's pressure gauge with stainless case and lead-free brass socket: ±1% (Grade 1A), NSF/ANSI 61 and 372 for drinking water.

Weiss NF402 Series 4" Industrial Gauge with 304 SS Stainless Steel CaseWeiss NF402 4 in dry (non-filled) industrial pressure gauge with 304 SS case and 316 SS internals: ±1% accuracy, ranges to 10,000 psi.

6

Vibration

Vibration switches warn of worn bearings, misalignment or imbalance before a pump fails.

Dwyer Series-VBS Compact Vibration Switch for RMS Monitoring, Adjustable Set Point & DelayCompact vibration switch; adjustable RMS velocity & delay; 4‑20 mA output

7

Seal Pot Level & Temperature

Ultrasonic level switches watch the barrier fluid level in mechanical seal pots, and temperature transmitters protect bearings and the pumped fluid from overheating.