Cooling & Heating Water
Liquid-Cooled Server Room (IRHX)
Liquid removes heat in row and returns cooled air to the aisle.
Measures: Coolant flow · Supply and return temperature · Differential pressure · Fan and pump status
Facility Water Flow & Energy
Meters chilled facility water delivered to the in-row heat exchangers so cooling energy per rack row is tracked.
Dwyer IEFB Insertion Thermal Energy Meter; Adj. 4"-36" PipesCurrent-Voltage-Pulse Outputs, Alarms; Optional BACnet & Modbus; 10', 20', 50' Sensor Leads
Dwyer Series-PFT Paddlewheel Flowmeters for Liquid Monitoring, Brass/316 SS, 4-20 mA OutputPaddlewheel Flowmeter for Liquids; IP67, Up to 25 ft/s
Fixed MinisonicTechnology Transit time ultrasonic flowmeter Signal treatment Analogic + ESC
Uf821 Ultrasonic Fixed FlowmeterHigh performing Adaptive Reliable Competitive Additional materials
Facility Water Pressure & Differential Pressure
Watches supply and return pressure across the facility loop to confirm pumps hold head and coils stay unblocked.
Dwyer 626/628 SS316L Industrial Pressure TransmittersMonitors fluids & air; 626 +/-0.25% / 628 +/-1% accuracy; 4-20mA or VDC output; PSI, BAR, PSIA ranges
Dwyer Series DX Wet to Wet Differential Pressure Switch; Use in most Gas/Water Based SolutionsSPDT Snap Switch; Contact Rating 5A @ 125/250 VAC, 5A Resistive @ 30 VDC; NEMAA 4X (IP65) Rated
Pump & Flow Verification
Confirms coolant distribution pumps are running and secondary loop flow is proven before IT load is applied.
Coolant Reservoir Level & Isolation
Detects low coolant in the CDU reservoir and provides isolation for service without draining the loop.
In-Row Heat Exchanger Pressure Monitoring
Transmitters and gauges monitor coolant line pressure to ensure consistent flow through the heat exchanger. This data prevents pump cavitation and identifies system blockages to maintain thermal stability for liquid-cooled server racks.
Dwyer 626/628 SS316L Industrial Pressure TransmittersMonitors fluids & air; 626 +/-0.25% / 628 +/-1% accuracy; 4-20mA or VDC output; PSI, BAR, PSIA ranges
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
In-Row Heat Exchanger Flow Sensing
Paddlewheel flowmeters monitor coolant velocity to ensure the heat exchanger receives sufficient volume for thermal transfer. Tracking flow rates allows for pump optimization and provides immediate notification of system blockages or pump failures that could lead to server overheating.
RH Temperature Sensing
Relative humidity and temperature sensors monitor aisle air conditions to ensure cooling efficiency and prevent condensation.
pH & Conductivity Measurement
Continuous pH and conductivity monitoring ensures cooling fluid chemistry remains within specification to prevent corrosion and mineral scaling.
Omega PHE-5460 Flat Surface In-Line pH/ORP ElectrodesFor 3/4", 1", or 2" pipe tees; Acryl Gel standard for high temperature; Flat surface; CPVC ORP; Fittings required
Omega Series PHTX-100 Loop Powered Indicating pH/ORP Meter & TransmitterIsolated pH/ORP/Temperature Meter & Transmitter System; Two-Wire 4-20 mA Output; IP65 (NEMA 4X); Wall & Panel Mounted
Omega CDE-45P 2-Wire Isolated Conductivity Transmitter SystemPEEK Sensor Body Construction; Electrode Coating Rejection Diagnostic; Universal Mounting Configurations; Accuracy Detail 0.3% of span
Omega Series CDTX45 2-Wire Isolated Conductivity Transmitter SystemIsolated Conductivity Transmitter System; 2-Wire 4-20 mA Output; 4 Titanium Electrodes; High Chemical Resistance; NEMA 4X Enclosure
Application data from the DwyerOmega Application Navigator ↗. Ronsor can help adapt it to your site.