Honeywell XNX XNX-AMSV-MHIV1 – MPD IR methane 0–100 %LEL, mV, ATEX, 316SS, M25
XNX-AMSV-MHIV1 is a factory-configured Honeywell XNX with MPD infrared methane 0–100 %LEL, mV personality, ATEX / IECEx (INMETRO on selected MPD SKUs), 4 × M25, 316 stainless steel, Modbus RTU + 4–20 mA HART, local HART port on the transmitter. It is the SKU for gas-transmission compounds and biogas roofs where catalytic poison or oxygen-free streams rule out CB1.
Same sensor, swap enclosure/approval: aluminium XNX-AMAV-MHIV1, 316SS XNX-AMSV-MHIV1, other approval XNX-UTSV-MHIV1. XNX-AMAV-MHIV1 · XNX-AMSV-MHIV1 · XNX-UTSV-MHIV1
Part-number decode
| Segment | Meaning | This SKU |
|---|---|---|
| XNX | Honeywell XNX universal transmitter | XNX |
| A / U | Approval A=ATEX/IECEx; U=UL/cUL | A |
| M / T | Entry M=M25; T=3/4" NPT | M |
| 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 | M |
| N / H | Local HART port N=no; H=yes | H |
| IV1 | MPD IR methane 0–100 %LEL | IV1 |
Same sensor, swap enclosure/approval: aluminium XNX-AMAV-MHIV1, 316SS XNX-AMSV-MHIV1, other approval XNX-UTSV-MHIV1.
Technical specifications
| Category | Transmitter Configured |
|---|---|
| Personality | mV personality (MPD catalytic / MPD IR) |
| Sensor / range | MPD IR methane 0–100 %LEL |
| Target | CH₄ / methane |
| Principle | MPD infrared (methane) |
| Output | Modbus RTU + 4–20 mA HART |
| Local HART | local HART port on the transmitter |
| Supply | 16–32 VDC (24 VDC nominal) |
| Enclosure | 316 stainless steel |
| Entries | 4 × M25 |
| Display | Backlit LCD, magnetic-wand menus |
| Ingress | IP66 |
| Approvals | ATEX / IECEx (INMETRO on selected MPD SKUs) |
| Temperature | −40~+65 ℃ |
| Mass | approx. 5.0 kg |
| Mates with | Honeywell MPD catalytic bead or MPD infrared sensors |
Why this personality / sensor
Methane is lighter than air and rises to roof vents. Dual-beam MPD IR does not need oxygen and ignores silicones. Mount high, under eaves or at the compressor-hall ridge, and keep the optical window out of wash-down.
Personality and replaceable parts
XNX-AMSV-MHIV1 uses the mV personality (MPD catalytic / MPD IR) board and mates with Honeywell MPD catalytic bead or MPD infrared sensors. Factory-fitted with MPD IR methane 0–100 %LEL. Spares live on product-3991. Do not substitute Sensepoint XCD cartridges on XNX.
Typical applications
City-gate stations, LNG boil-off rooms and anaerobic-digester roofs need a methane-specific IR point. XNX holds the trip while operators stay outside the classified shed.
Selection contrast
| P/N | Gas | Range | Option | Body |
|---|---|---|---|---|
| XNX-AMAV-MHIV1 | CH₄ | 0–100 %LEL | Modbus | Aluminium |
| XNX-UTSV-MHIV1 | CH₄ | 0–100 %LEL | Modbus | 316SS |
| XNX-AMSV-MHCB1 | LEL | 0–100 %LEL | Modbus | 316SS |
| XNX-AMSV-MHIF1 | C₃H₈ | 0–100 %LEL | Modbus | 316SS |
| XNX-AMSV-MHIC1 | CO₂ | 0–5 %v/v | Modbus | 316SS |
| XNX-AMSV-MHNNN | body | — | Modbus | 316SS |
| XNX-AMSV-NHIV1 | CH₄ | 0–100 %LEL | HART | 316SS |
Installation and wiring
Wall-mount XNX-AMSV-MHIV1 (316 stainless steel, approx. 5.0 kg) on a rigid stand sized for that mass. This SKU uses 4 × M25 entries—glands must match; do not retap XNX-AMSV-MHIV1. Land XNX-AMSV-MHIV1 4–20 mA HART per the loop drawing; relays/Modbus/FFB exist only on the matching option board. Magnetic-wand menus on the XNX-AMSV-MHIV1 lid stay non-intrusive. Park the XNX-AMSV-MHIV1 methane IR at the ridge and out of wash-down.
FAQ
- Does the XNX-AMSV-MHIV1 IR cell see propane?
- Poorly. Propane has its own IF1 SKU. Do not substitute XNX-AMSV-MHIV1 on an LPG skid.
- Why not use catalytic CB1 instead of XNX-AMSV-MHIV1 for methane?
- If the stream can be inert or silicone-contaminated, the pellistor goes to sleep. XNX-AMSV-MHIV1 IR keeps working at 0 % oxygen.
- Why is XNX-AMSV-MHIV1 316SS instead of aluminium?
- XNX-AMSV-MHIV1 is the marine/sour-service body (~5 kg). Inland dry rooms can take aluminium sibling XNX-AMAV-MHIV1 and save mass on the bracket.
- Can I convert XNX-AMSV-MHIV1 from ATEX M25 to NPT in the field?
- No. XNX-AMSV-MHIV1 flameproof entries are machined M25. North-American NPT is UL sibling XNX-UTSV-MHIV1, not an adaptor on this ATEX body.
- Can I retrofit Foundation Fieldbus on XNX-AMSV-MHIV1 after it ships?
- No. XNX-AMSV-MHIV1 is the Modbus RTU option board. FFB is a different sales option (XNX-AMSV-FHIV1), 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-AMSV-MHIV1 or UL XNX-UTSV-MHIV1 rather than a dead SKU.