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Amphenol Sensors
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Data center sensing

Data Center BESS & UPS Sensors

Sensors for battery packs, BMS, BESS and Li-ion UPS thermal and fire safety, including temperature, gas, airflow, leak and current sensing.

What we measure

Sensor coverage for bess / li-ion ups

Explore sensor technologies mapped to Battery Packs · BMS · PCS · Containerized · Thermal · Fire Safety. Product application notes below identify where each sensor fits within this data center sub-system.

Available technologies

Sensors for BESS / Li-ion UPS

27 products · 7 categories

Not sure what you need? Tell us about your bess / li-ion ups application and our team will recommend the right sensors.

All Sensors

Panel-mount CoBeam2™ transmitter

Applications

  • BESS enclosure ΔP — detects thermal-event overpressure early
Range
±0.25 inH₂O bidirectional
Accuracy
±0.5% FSO
Output
4–20 mA (2-wire)
NovaSensor

SMT MEMS + ASIC in miniature housing

Applications

  • BESS BMS board-mount enclosure-pressure feedback (SOIC-14 onto controller PCBs for thermal-runaway pressure-rise detection)
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

  • BESS enclosure ventilation ΔP (board-mount in BMS 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

  • BESS off-gas / enclosure overpressure with temperature
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.

Thermometrics

Screw-fixed surface NTC

Applications

  • BESS pack-level terminal-connection monitoring (ring-terminal mount on cell tabs and busbar studs)
Operating
−40 to +125 °C
R @ 25 °C
5K / 10K / 20K / 50K / 100K Ω
Form factor
Ring-terminal screw-mount
Thermometrics

Acid/moisture-resistant coated chip

Applications

  • BESS module-level cell-temperature monitoring — chip-level NTC that survives the corrosive environment inside Li-ion battery packs (electrolyte off-gas, condensation, acid exposure)
Operating
−40 °C to +190 °C
Compliance
AEC-Q200 Rev D · RoHS · REACH
Features
Shock-resistant · silver-migration resistant
Thermometrics

Resin-coated NTC with RF decoupling

Applications

  • Battery-pack cell temperature inside BESS modules (RF-noise immune)
Feature
Integrated RF decoupling — EMI-immune
Range
Up to +155 °C (epoxy)
Compliance
GMW3097 / ISO 11452
Thermometrics

Non-contact IR temp modules

Applications

  • Cell / busbar temperature in BESS modules without penetrating the enclosure
Type
Non-contact IR thermopile
Output
Digital I²C (24-bit ZTPD)
Supply
4.75–5.25 V; ~4.5 mA
Telaire

OEM board-level T+RH

Applications

  • BESS module T+RH probe in the BMS environmental string (IP67 cable)
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

  • In-enclosure ambient T+RH (heater handles condensation recovery after door-open events)
RH accuracy
±2.0% RH (20–80%)
Output
RS-485 Modbus
Protection
IP67
Telaire

OEM NDIR module with ABC Logic™

Applications

  • Low-cost OEM CO₂ sensor option for BESS off-gas detection where the IP65 housing of T3022 isn't required (in-pack PCB integration)
Range
0–5000 ppm CO₂
Accuracy
±30 ppm ±3% of reading
Output
I²C · UART Modbus · PWM
Amphenol

Epoxy-hardened waterproof transmitter

Applications

  • BESS battery-room humidity (corrosive-atmosphere tolerance)
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

  • BMS-board T+RH for cell-pack condensation alarming and dew-point trending
Type
Capacitive RH+T, LCC SMD
RH accuracy
±2.0% RH (20–80%)
Temp accuracy
±0.3 °C
Telaire

MEMS thermal air-velocity sensor

Applications

  • BESS enclosure forced-ventilation airflow verification (MEMS, no moving parts)
Ranges
0–7 m/s or 0–15 m/s
Interface
I²C 12-bit
Response
125 ms typ
SGX Sensortech

BESS internal-pack pressure & ROC

Applications

  • BESS pack-level absolute-pressure + rate-of-change monitoring (pre-vent indicator of thermal runaway)
  • Containment-failure detection where H₂ venting paths are masked
Range
50 – 165 kPa abs
Accuracy
±2.3 kPa (0–85 °C)
Interface
CAN 500 kbps, USCAR 6-pin

Custom variant

Optional SENT single-wire interface for direct BMS integration where CAN bus is saturated; custom pressure range (e.g. tight-window 80–150 kPa) on request for specific pack geometries.

SGX Sensortech

Thermal-conductivity H₂ + CO vent sensor

Applications

  • BESS H₂ leak detection with CO vent-phase corroboration (thermal-conductivity works in any O₂ level, unlike electrochemical)
H₂ range
0–4% v/v (guaranteed)
Response
<1 s
Supply / comm
9–36 V DC · CAN 500 kbps
SGX Sensortech

Functional-safety H₂ leak sensor

Applications

  • Functional-safety H₂ sensor for top-tier BESS and UPS platforms targeting UL 9540A early-detection signal paths
Safety
ISO 26262 SEooC
Range
0 – 4 vol.% H₂
Response
<1 s (100 ms CAN frame)
Telaire

Module-level H₂ sensor

Applications

  • Module-level BESS H₂ monitoring embedded in BMS boards where space is constrained (15 mm SMT, <4 mA)
Range
0 – 16 % H₂ (0 – 160,000 ppm)
Package
15 × 15 mm SMT
Response
1 s typ. (T63%)

Custom variant

15 mm SMT package reflows onto BMS / monitoring PCBs; ratiometric output pairs with any 16-bit ADC. Tape-and-reel for volume PCB assembly.

Telaire

H₂ + P + T + RH in one module

Applications

  • Single-point multi-parameter BESS pack monitoring — one module covers H₂, pressure, T and RH
  • Consolidates four sensor integrations into one J1939 node on the pack harness
Inputs
H₂, pressure, T, RH
Interface
CAN 2.0B (J1939)
Temp range
−40 to +105 °C
Thermometrics

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

Applications

  • BESS liquid-cooling loop leak detection
Type
Rope-style conductive leak detection
Family
RLDS-B / RLDS-P / RLDS-E controllers
Cable support
Up to 1,500 m (Elite positioning)
Rochester

Custom float and leak switches (point level)

Applications

  • Point leak-switch in BESS liquid-cooling drip trays
Type
Custom-engineered float & leak switches
Capabilities
Multi-level, side-mount, continuous, P+T combos
Mfg.
IATF 16949 — Coppell, TX

Custom variant

Built-to-order: specify stem length, float material, switch action (N.O./N.C.), process fitting, cable and connector. Rochester Quick-Turn (Coppell, TX) builds from the 9871 / 9872 / 9873 / 9875 families — IATF 16949 North-American manufacturing, OEM-volume capable.

Piher

Open-loop Hall-effect current sensor

Applications

  • BESS DC-bus current monitoring (bidirectional, DC-capable Hall)
Range
±25 A – ±1,000 A
Output
Ratiometric 0.5 – 4.5 V
IP
IP67 / IP69K

Custom variant

Split-core (clamp-on) retrofit variant for installation on live feeders without disconnecting wires; custom window geometry for non-standard busbar sections on request.

Piher

3-phase busbar current sensor

Applications

  • BESS DC-bus current at pack and string level
Range
Up to ±1,200 A (3-phase)
Response time
3 μs max
Output
3× ratiometric 0.5 – 4.5 V

Custom variant

3-phase press-fit housing matches Infineon HybridPack busbar geometry; DC-capable Hall core for BESS and rectifier sections; customer-specified range and output via ASIC trim.

Thermometrics

A-2130 design-in kit (Type YQ / PTF)

Applications

  • Inrush-current protection on BESS pre-charge resistors and DC-bus contactors; in-line circuit-breaker / fuse protection on PCS auxiliary loads
Type PTF
Bare ceramic PTC disc — 18–240 V
Type YQ
Green-silicone-coated PTC
Companion
A-2130 NTC inrush-limiter kit
Thermometrics

NTC discs for inrush current limiting

Applications

  • BESS PCS DC-bus pre-charge — soft-start of large filter capacitor banks at turn-on, then low steady-state power loss
  • Inverter front-end and DC/DC converter soft-start in PCS auxiliary power conversion
Family
CL-11 → CL-210 (~21 SKUs)
R₀ @ 25 °C
0.5 Ω – 120 Ω (±25%)
Max steady current
1.1 – 16 A RMS

Custom variant

Complementary to the PTC current-limiter family — both ship from the same St. Marys, PA facility and share the A-2130 multi-product design-in kit. PTC starts low-resistance and rises (over-current latch protection); NTC starts high cold-resistance and drops as it heats (soft-start of large capacitive loads). Pair the two for full inrush + over-current coverage in DC-bus pre-charge, server PSUs, UPS, BESS PCS and motor-drive front-ends.

Telaire

SIP through-hole T+RH module

Applications

  • BMS retrofit T+RH where SMT redesign isn't feasible
RH accuracy
±2.0% RH (20–80%)
Output
I²C or PDM
Package
4-pin SIP through-hole
Telaire

IP65 NDIR CO₂ sensor for OEM

Applications

  • Pre-thermal-runaway low-range CO₂ inside Li-ion BESS enclosures — early off-gas detection from cell vents, IP65 housing for in-rack placement
Method
NDIR, gold-plated optics
Output
I²C digital
Ingress
IP65