Honeywell XNX XNX-UTSV-NNCB1 – MPD catalytic 0–100 %LEL, mV, UL, 316SS, 3/4" NPT
XNX-UTSV-NNCB1 is a factory-configured Honeywell XNX gas detector: mV personality, MPD catalytic bead 0–100 %LEL, UL / cUL, 4 × 3/4" NPT, 316 stainless steel, 4–20 mA HART only (no option board), no local HART port. Specify it for mixed hydrocarbon LEL points where infrared windows would fog or the stream is not methane/propane-specific.
Same sensor, swap enclosure/approval: aluminium XNX-UTAV-NNCB1, 316SS XNX-UTSV-NNCB1, other approval XNX-AMSV-NNCB1. XNX-UTAV-NNCB1 · XNX-UTSV-NNCB1 · XNX-AMSV-NNCB1
Part-number decode
| Segment | Meaning | This SKU |
|---|---|---|
| XNX | Honeywell XNX universal transmitter | XNX |
| A / U | Approval A=ATEX/IECEx; U=UL/cUL | U |
| M / T | Entry M=M25; T=3/4" NPT | T |
| A / S | Enclosure A=aluminium; S=316SS | S |
| V / I / E | Personality V=mV(MPD); I=IR Optima/Excel; E=EC | V |
| N / R / M / F | Option N=HART only; R=relays; M=Modbus; F=FFB | N |
| N / H | Local HART port N=no; H=yes | N |
| CB1 | MPD catalytic 0–100 %LEL | CB1 |
Same sensor, swap enclosure/approval: aluminium XNX-UTAV-NNCB1, 316SS XNX-UTSV-NNCB1, other approval XNX-AMSV-NNCB1.
Technical specifications
| Category | Transmitter Configured |
|---|---|
| Personality | mV personality (MPD catalytic / MPD IR) |
| Sensor / range | MPD catalytic 0–100 %LEL |
| Target | LEL / flammable gas (catalytic) |
| Principle | MPD catalytic bead |
| Output | 4–20 mA HART only (no option board) |
| Local HART | no local HART port |
| Supply | 16–32 VDC (24 VDC nominal) |
| Enclosure | 316 stainless steel |
| Entries | 4 × 3/4" NPT |
| Display | Backlit LCD, magnetic-wand menus |
| Ingress | IP66 |
| Approvals | UL / cUL |
| Temperature | −40~+65 ℃ |
| Mass | approx. 5.0 kg |
| Mates with | Honeywell MPD catalytic bead or MPD infrared sensors |
Why this personality / sensor
A poison-resistant MPD pellistor sees combustion heat across a wide hydrocarbon mix, including species an IR filter misses. It needs oxygen and hates silicones. Mount above light-gas releases and below heavy vapours; keep silicone sealants off the sinter.
Personality and replaceable parts
XNX-UTSV-NNCB1 uses the mV personality (MPD catalytic / MPD IR) board and mates with Honeywell MPD catalytic bead or MPD infrared sensors. Factory-fitted with MPD catalytic 0–100 %LEL. Spares live on product-3991. Do not substitute Sensepoint XCD cartridges on XNX.
Typical applications
Pump rooms, filling gantries and compressor packages still standardise on catalytic LEL because the gas slate is mixed. XNX holds 4–20 mA HART into the ESD matrix; magnetic non-intrusive calibration keeps the flameproof lid closed.
Selection contrast
| P/N | Gas | Range | Option | Body |
|---|---|---|---|---|
| XNX-UTAV-NNCB1 | LEL | 0–100 %LEL | HART | Aluminium |
| XNX-AMSV-NNCB1 | LEL | 0–100 %LEL | HART | 316SS |
| XNX-UTSV-NNIV1 | CH₄ | 0–100 %LEL | HART | 316SS |
| XNX-UTSV-NNIF1 | C₃H₈ | 0–100 %LEL | HART | 316SS |
| XNX-UTSV-NNIC1 | CO₂ | 0–5 %v/v | HART | 316SS |
| XNX-UTSV-NNNNN | body | — | HART | 316SS |
| XNX-UTSV-RNCB1 | LEL | 0–100 %LEL | Relays | 316SS |
Installation and wiring
Wall-mount XNX-UTSV-NNCB1 (316 stainless steel, approx. 5.0 kg) on a rigid stand sized for that mass. This SKU uses 4 × 3/4" NPT entries—glands must match; do not retap XNX-UTSV-NNCB1. Land XNX-UTSV-NNCB1 4–20 mA HART per the loop drawing; relays/Modbus/FFB exist only on the matching option board. Magnetic-wand menus on the XNX-UTSV-NNCB1 lid stay non-intrusive. Keep silicones off the XNX-UTSV-NNCB1 pellistor; light hydrocarbons high, heavy vapours low.
FAQ
- Will silicone vapours kill the XNX-UTSV-NNCB1 pellistor?
- Yes. Silicones and chlorinated solvents poison the MPD catalytic bead on XNX-UTSV-NNCB1. Specify IV1/IF1 infrared if those contaminants are routine.
- What bump-test gas should I use on XNX-UTSV-NNCB1?
- Use the target hydrocarbon at 50 %LEL. Methane-only test gas will under-state response if the process is petrol vapour.
- Why is XNX-UTSV-NNCB1 316SS instead of aluminium?
- XNX-UTSV-NNCB1 is the marine/sour-service body (~5 kg). Inland dry rooms can take aluminium sibling XNX-UTAV-NNCB1 and save mass on the bracket.
- Why is XNX-UTSV-NNCB1 NPT instead of M25?
- XNX-UTSV-NNCB1 is the UL/cUL body and ships 3/4" NPT. Do not tap M25 on this lid—order ATEX sibling XNX-AMSV-NNCB1 if metric glands are mandatory.
- Does XNX-UTSV-NNCB1 include alarm relays?
- No. XNX-UTSV-NNCB1 is 4–20 mA HART only. Local trip contacts need option-R sibling XNX-UTSV-RNCB1; plant-bus needs Modbus XNX-UTSV-MNCB1 or Foundation Fieldbus XNX-UTSV-FNCB1.
Documents
Honeywell XNX datasheet / manual · On-site XNX selection matrix
Availability and enquiry
Stock is lot-based. If this box is out, jump to 316SS XNX-UTSV-NNCB1 or UL XNX-UTSV-NNCB1 rather than a dead SKU.