Honeywell XNX XNX-UTAV-MHNNN – no sensor (transmitter body), mV, UL, Aluminium, 3/4" NPT
XNX-UTAV-MHNNN is a Honeywell XNX universal transmitter body with the mV personality, UL / cUL, 4 × 3/4" NPT entries, LM25 aluminium (painted), Modbus RTU + 4–20 mA HART, local HART port on the transmitter, and no MPD sensor in the carton. Order it when the field later fits an MPD catalytic or MPD IR head (CB1 / IV1 / IF1 / IC1) instead of a factory-configured detector.
Same sensor, swap enclosure/approval: aluminium XNX-UTAV-MHNNN, 316SS XNX-UTSV-MHNNN, other approval XNX-AMAV-MHNNN. XNX-UTAV-MHNNN · XNX-UTSV-MHNNN · XNX-AMAV-MHNNN
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 | A |
| 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 | M |
| N / H | Local HART port N=no; H=yes | H |
| NNN | no sensor (transmitter body) | NNN |
Same sensor, swap enclosure/approval: aluminium XNX-UTAV-MHNNN, 316SS XNX-UTSV-MHNNN, other approval XNX-AMAV-MHNNN.
Technical specifications
| Category | 变送器本体 |
|---|---|
| Personality | mV personality (MPD catalytic / MPD IR) |
| Sensor / range | no sensor (transmitter body) |
| Target | body / sensor not fitted |
| Principle | personality board only |
| Output | Modbus RTU + 4–20 mA HART |
| Local HART | local HART port on the transmitter |
| Supply | 16–32 VDC (24 VDC nominal) |
| Enclosure | LM25 aluminium (painted) |
| Entries | 4 × 3/4" NPT |
| Display | Backlit LCD, magnetic-wand menus |
| Ingress | IP66 |
| Approvals | UL / cUL |
| Temperature | −40~+65 ℃ |
| Mass | approx. 2.8 kg |
| Mates with | Honeywell MPD catalytic bead or MPD infrared sensors |
Why this personality / sensor
The mV personality is the millivolt interface for Honeywell MPD heads. Catalytic and MPD IR share that board; an IR Optima/Excel head will not talk to this SKU, and an electrochemical cell needs the EC personality. Buy a body when the sensor slate is still open or when you stock transmitters separately from MPD cartridges.
Personality and replaceable parts
XNX-UTAV-MHNNN uses the mV personality (MPD catalytic / MPD IR) board and mates with Honeywell MPD catalytic bead or MPD infrared sensors. This SKU ships without a sensor; order the head by gas. Spares live on product-3991. Do not substitute Sensepoint XCD cartridges on XNX.
Typical applications
Typical body SKUs sit in a warehouse next to mixed MPD stock: pump rooms that may take catalytic LEL, biogas roofs that need methane IR, LPG pits that need propane IR, and inerting cabinets that need CO₂. The transmitter is already certified and threaded; you only mate the MPD later.
Selection contrast
| P/N | Gas | Range | Option | Body |
|---|---|---|---|---|
| XNX-UTSV-MHNNN | body | — | Modbus | 316SS |
| XNX-AMAV-MHNNN | body | — | Modbus | Aluminium |
| XNX-UTAV-MHCB1 | LEL | 0–100 %LEL | Modbus | Aluminium |
| XNX-UTAV-MHIV1 | CH₄ | 0–100 %LEL | Modbus | Aluminium |
| XNX-UTAV-MHIF1 | C₃H₈ | 0–100 %LEL | Modbus | Aluminium |
| XNX-UTAV-MHIC1 | CO₂ | 0–5 %v/v | Modbus | Aluminium |
| XNX-UTAV-NHNNN | body | — | HART | Aluminium |
Installation and wiring
Wall-mount XNX-UTAV-MHNNN (LM25 aluminium (painted), approx. 2.8 kg) on a rigid stand sized for that mass. This SKU uses 4 × 3/4" NPT entries—glands must match; do not retap XNX-UTAV-MHNNN. Land XNX-UTAV-MHNNN 4–20 mA HART per the loop drawing; relays/Modbus/FFB exist only on the matching option board. Magnetic-wand menus on the XNX-UTAV-MHNNN lid stay non-intrusive. XNX-UTAV-MHNNN is a body: wall-mount the transmitter first and mate the head after the personality is confirmed—do not buy a configured SKU until the gas is frozen.
FAQ
- Can I add an MPD sensor to XNX-UTAV-MHNNN later?
- XNX-UTAV-MHNNN ships as a transmitter body. mV personalities accept MPD CB1/IV1/IF1/IC1 heads; IR personalities need Optima/Excel; EC personalities need XNX electrochemical cells. Do not mix those three families on this board.
- Is XNX-UTAV-MHNNN a complete gas detector?
- No. XNX-UTAV-MHNNN is electronics and enclosure only. A configured detector has a three-character sensor code such as CB1 instead of NNN.
- When should I swap XNX-UTAV-MHNNN aluminium for 316SS?
- Use XNX-UTAV-MHNNN (aluminium, ~2.8 kg) in inland, painted plant. Coastal, splash and sour-water decks should move to stainless sibling XNX-UTSV-MHNNN.
- Why is XNX-UTAV-MHNNN NPT instead of M25?
- XNX-UTAV-MHNNN is the UL/cUL body and ships 3/4" NPT. Do not tap M25 on this lid—order ATEX sibling XNX-AMAV-MHNNN if metric glands are mandatory.
- Can I retrofit Foundation Fieldbus on XNX-UTAV-MHNNN after it ships?
- No. XNX-UTAV-MHNNN is the Modbus RTU option board. FFB is a different sales option (XNX-UTAV-FHNNN), not a jumper on this lid.
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-MHNNN or UL XNX-UTAV-MHNNN rather than a dead SKU.