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Data center sensing

Data Center Air Cooling Sensors

Sensors for CRAC, CRAH, chillers and cooling towers, including pressure, temperature, humidity, airflow, gas, leak and vibration sensing.

What we measure

Sensor coverage for air cooling

Explore sensor technologies mapped to CRAC / CRAH · Chillers · Cooling Towers · In-Row · Economizers · Compressors · Controls. Product application notes below identify where each sensor fits within this data center sub-system.

Available technologies

Sensors for Air Cooling

37 products · 9 categories

Not sure what you need? Tell us about your air cooling application and our team will recommend the right sensors.

Telaire

Low-ΔP / gauge / vacuum transmitter

Applications

  • CRAC/CRAH duct ΔP and static-pressure control
  • VAV damper feedback
  • Air-handler filter-health monitoring (pre/post filter ΔP)
Ranges
0.3 – 10 inH₂O (9 codes)
Accuracy
±1% of span
Models
T10 / T20 / T30 (V or 4–20 mA)
NovaSensor

NovaSensor NPI/IPT Harsh-Media Family

Applications

  • Whitespace pressurization control (positive or negative)
  • CRAC refrigerant-line high-side / low-side pressure
Range
1 – 15,000 psi
Output
4–20 mA, 0–5/10 V, I²C, SPI
Accuracy
±0.25% FS
All Sensors

Panel-mount CoBeam2™ transmitter

Applications

  • CRAC/CRAH filter-health ΔP at low spans
  • Whitespace pressurization monitoring (bidirectional ±0.25 inH₂O)
Range
±0.25 inH₂O bidirectional
Accuracy
±0.5% FSO
Output
4–20 mA (2-wire)
SSI

Compact media-isolated, oil-filled

Applications

  • CRAC compressor high/low-side pressure
Ranges
15–7500 psi (G/A/S)
Accuracy
±0.25% typ; ±1.0% FSS TEB
Output
0.5–4.5 V · 1–5 V · 4–20 mA
NovaSensor

SMT MEMS + ASIC in miniature housing

Applications

  • OEM-integrated ΔP inside CRAC/CRAH controllers and VAV modules
  • Board-level duct and air-filter monitoring
  • Altitude / barometric compensation for airflow and RH sensors
Range
2" H₂O to 30 PSI (A/D/G)
Output
Analog + I²C / SPI / SENT
Package
SOIC-14 SMT T&R

Custom variant

SMT tape-and-reel with customer-logo marking for OEM PCB integration; digital (I²C/SPI/SENT) and analog variants share pinout; barometric-only NPA-700 range for altitude compensation.

NovaSensor

Board-mount piezoresistive ΔP

Applications

  • CRAC compressor and refrigerant-line pressure (board-mount NPC into CRAC controllers)
Ranges
10" H₂O – 100 psi (G/D/A)
Output
50–150 mV piezoresistive
Linearity
±0.1% FSO (±0.25% on 5 psi)
NovaSensor

Low-Cost Media-Compatible P+T

Applications

  • CRAC compressor high-side pressure
  • Refrigerant suction-line P+T in a single penetration
Tech
PT1907 MEMS die, no oil fill
Range
15 – 600 psi
Output
I²C, SPI, 4–20 mA, Analog, SENT

Custom variant

LCMC is a platform, not a single SKU — specify range, interface (I²C / SPI / 4–20 mA / SENT), process connection and cable pigtail per CDU / compressor integration. No oil-fill keeps it glycol- and refrigerant-safe.

All Sensors

Dual-die CoBeam2™ transducer

Applications

  • VAV flow control (fan and duct ΔP)
  • CRAC/CRAH low-range duct ΔP where a dual-die span of ±2 inH₂O is needed
Type
Dual-die cross-coupled low-ΔP
Range
0–5 inH₂O / 0–2 inH₂O
Supply
4.75–5.25 Vdc (typ 5 V)
All Sensors

Leadless dual-die digital ΔP

Applications

  • Server-chassis airflow ΔP for fan-curve control and blocked-intake alarms (ducted whitespace)
Type
Leadless dual-die CoBeam2™
Range
±0.5 to ±60 inH₂O (G/D)
Output
Digital I²C & SPI
All Sensors

Ultra-low-pressure CoBeam2™

Applications

  • CRAC/CRAH whitespace ultra-low-pressure monitoring on PSUs and liquid-assisted air handlers
Type
Ultra-low-ΔP CoBeam2™
Range
0.5–30 inH₂O · 1–150 psi
Output
I²C · SPI · analog
NovaSensor

NovaSensor FMA Series — NPA piezoresistive

Applications

  • CRAC/CRAH filter-clog monitoring with automotive-grade connector
  • Air-handler ΔP diagnostics
  • Generator intake-filter monitoring
Type
Piezoresistive NPA filter ΔP
Ranges
5" H₂O – 5 PSI (gauge)
Output
0.5–4.5 V ratiometric
NovaSensor

Miniature SO-8 SMT barometric

Applications

  • Whitespace pressurization control (positive / negative) at board level
  • Barometric compensation for airflow and RH sensors
Range
100 – 700 kPa absolute
Tech
Silicon Fusion Bonded
Package
SO-8 SMT
Amphenol Sensors

High-pressure P+T with stainless-steel diaphragm

Applications

  • High-pressure refrigerant lines (single penetration, universal-media diaphragm)
Range
10 – 350 bar (145 – 5000 psi)
Diaphragm
Stainless steel — universal media
Feature
P + T in one sensor body
Thermometrics

Waterproof IP68 overmolded NTC

Applications

  • HVAC duct-insertion temperature (waterproof overmold)
Protection
IP68 waterproof overmold
Range
−50 to +105 °C (+125 °C ≤ 6 h)
Thermistor
10 kΩ NTC

Custom variant

Longer probe lengths (6″ / 12″) for duct insertion; threaded SS housing for pipe immersion; networked multi-probe cable (up to 8 probes / run) for rack-row monitoring.

Thermometrics

Duct-mount averaging NTC

Applications

  • Air-handler return / supply averaging across wide ducts (single sensor, multi-point average)
Type
Duct-mount averaging NTC
Resistance
10 kΩ ±1% at 25 °C
Operating
−40 to +85 °C
Thermometrics

Acid/moisture-resistant coated chip

Applications

  • Harsh-environment ambient temperature for outdoor CRAC condensers and humid-coast deployments (epoxy-coated, acid-resistant lead)
Operating
−40 °C to +190 °C
Compliance
AEC-Q200 Rev D · RoHS · REACH
Features
Shock-resistant · silver-migration resistant
Telaire

Duct- and wall-mount RH + T transmitter

Applications

  • CRAC/CRAH white-space ambient T+RH integration — field-replaceable capacitive tip keeps the transmitter in place during recalibration
RH accuracy
±2%, ±3% or ±5% RH
Output
4–20 mA, 0–5 V or 0–10 V
Drift
<1% RH / year typ.
Telaire

Dew-point / enthalpy / wet-bulb

Applications

  • Outdoor / rooftop CRAC and economizer ambient where dew-point and wet-bulb matter for free-cooling control
  • Extended-range RH/T ambient monitoring above standard 0–100% / 100% condensing limits
Operating env
−40 to +60 °C, 0–99% RH
Output
4–20 mA, 0–5 V or 0–10 V
Measurands
Dew Pt · Enthalpy · Wet Bulb · Dry Bulb
Telaire

OEM board-level T+RH

Applications

  • OEM-integrated T+RH inside CRAC/CRAH, CDU, PDU and rack-level environmental monitors (I²C or PDM)
RH accuracy
±2.0% RH (20–80%)
Temp accuracy
±0.5 °C (14-bit)
Output
I²C or PDM
Telaire

Rugged ambient, ChipCap 2 core

Applications

  • BESS battery-room ambient T+RH with Modbus daisy-chain to the BMS
RH accuracy
±2.0% RH (20–80%)
Output
RS-485 Modbus
Protection
IP67
Telaire

OEM NDIR module with ABC Logic™

Applications

  • DCV for CRAC/CRAH without periodic manual calibration (ABC Logic self-calibrates from fresh-air reference cycles)
Range
0–5000 ppm CO₂
Accuracy
±30 ppm ±3% of reading
Output
I²C · UART Modbus · PWM
Telaire

Wall-mount CO₂ transmitter

Applications

  • Wall-mount DCV (demand-controlled ventilation) with analog output direct to BMS
Range
0–2000 ppm CO₂
Accuracy
±30 ppm or ±3% of reading
Output
0–5/0–10 V or 4–20 mA
Telaire

CO₂ / CO₂+RH / CO₂+RH+T

Applications

  • DCV CO₂ monitoring and control on a BACnet backbone; optional T+RH on the same device (rewire-free replace)
CO₂ accuracy
±30 ppm or ±3% of rdg
RH accuracy (opt.)
±2.5% RH (20–80%)
Supply
18–30 VAC or 10.8–42 VDC
Amphenol

Epoxy-hardened waterproof transmitter

Applications

  • Ambient RH where epoxy-hardened waterproof construction is required (washdown / dusty halls)
RH accuracy
±2% RH (30–95%) @ 25 °C
Feature
Withstands 100% saturation
Output
4–20 mA, 0–5 V or 0–10 V
Telaire

Capacitive RH + T with integrated ASIC

Applications

  • OEM SMT board-mount T+RH inside CRAC/CRAH and CDU controller PCBs (sub-0.5% drift/yr; condensation alarm output)
Type
Capacitive RH+T, LCC SMD
RH accuracy
±2.0% RH (20–80%)
Temp accuracy
±0.3 °C
Telaire

HS20 / HS12SP / HS30P family

Applications

  • HVAC return-air RH
  • CRAC humidity control — use HS30P where sub-zero start-up is possible
Type
Bulk-resistance RH (thin-film polymer)
Variants
HS20 / HS12SP / HS30P
Drive
Low-V AC, 50 Hz – 1 kHz
Telaire

MEMS thermal air-velocity sensor

Applications

  • CRAC/CRAH return-air velocity
  • VAV damper feedback closed-loop control
  • Filter-health trending via pre/post-filter Δv
Ranges
0–7 m/s or 0–15 m/s
Interface
I²C 12-bit
Response
125 ms typ
Telaire

MEMS thermal-conductivity A2L sensor

Applications

  • Early A2L (R454B) refrigerant-leak detection on CRAC compressors and refrigerant lines
Targets
R454B · R32
Range
0–100 %LFL (0.1 %LFL res.)
Comm
RS-485 Modbus RTU
Thermometrics

RLDS-B / RLDS-P / RLDS-E controllers

Applications

  • CRAC condensate-pan overflow rings
Type
Rope-style conductive leak detection
Family
RLDS-B / RLDS-P / RLDS-E controllers
Cable support
Up to 1,500 m (Elite positioning)
Wilcoxon

High-MTBF industrial accelerometer

Applications

  • CRAC-compressor bearing and scroll vibration monitoring (API 670)
Sensitivity
100 mV/g ±5%
Response
0.5 – 14,000 Hz
Max temp
120 °C
Compliance
API 670; CSA / ATEX / IECEx variants
IMI

Echo® sensor + EchoPlus® wireless

Applications

  • Wireless predictive-maintenance on hard-to-wire rotating equipment — CRAC compressors, CDU pumps, genset bearings
System
Wireless sensor + EchoPlus® JB + Receiver
Measures
Peak/RMS vel, accel, crest factor
Integration
Modbus®
All Sensors

Stainless-steel piezoresistive — high media compatibility

Applications

  • High-pressure media-compatible monitoring on compressor / refrigerant lines / chiller pressure (SS 316/316L wetted)
Tech
Piezoresistive (SS 316/316L wetted)
Range
200 mbar – 35 bar (A / G / V)
Output
mV (1.5 mA constant-current)
All Sensors

Stainless-steel piezoresistive — analog + I²C

Applications

  • Digital + analog dual-output pressure monitoring on compressor / refrigerant / chiller systems (I²C to BMS controllers, ratiometric to legacy analog inputs)
Tech
Piezoresistive + ASIC (SS 316/316L)
Range
200 mbar – 35 bar / 3 – 500 psi
Output
0.5–4.5 V ratiometric + I²C
Telaire

SIP through-hole T+RH module

Applications

  • Field-installable T+RH on retrofit CRAC/CRAH controllers where the daughterboard uses through-hole only
RH accuracy
±2.0% RH (20–80%)
Output
I²C or PDM
Package
4-pin SIP through-hole
SGX Sensortech

NDIR R-290 (propane) refrigerant leak detector

Applications

  • A2L / R-290 refrigerant-leak detection in CRAC/CRAH and rooftop air handlers transitioning to natural refrigerants (UL 60335-2-40 compliant)
Target
R-290 (propane) refrigerant
Range
0 – 100% LEL (0 – 21000 ppm)
Tech
NDIR — selective, no cross-sensitivity
i2s

Compact media-isolated, piezoresistive SS or MEMS technology

Applications

  • CRAC compressor suction / discharge pressure (refrigerant-rated, A2L-compatible)
Ranges
0–10 bar / 0–40 bar (a and g)
Total error band
±1.0% FSS
Output
0.5–4.5 V ratiometric · 4–20 mA
Airmar

Ultrasonic outdoor environmental monitor — wind, T, RH, P, rain

Applications

  • Airside economizer & free-cooling enablement (outdoor T, RH, dew-point)
  • Wet-bulb feed for cooling-tower / adiabatic make-up control
  • Site weather alerting — wind, rain, lightning indirect (ΔP)
Measures
Wind, Temp, RH, Barometric P, Rain
Tech
Ultrasonic anemometry · no moving parts
Outputs
NMEA 0183 · NMEA 2000 (CAN) · RS-232/422