Honeywell Searchpoint Optima Plus 2108N4411N – Standard, Ethylene, ATEX / IECEx / MED, 4–20 mA
2108N4411N is a Honeywell Searchpoint Optima Plus point IR flammable detector (Ethylene calibration), ATEX / IECEx / MED, M25, 316SS, 4–20 mA, with dust barrier + weather housing + deluge shade with remote gassing cell (RGC). Use this infrared point where catalytic beads poison or the stream is oxygen-free—do not substitute a Sensepoint XCD pellistor.
Siblings: HART 2108N4411H, gas 2108N4410N, style —, approval 2108N4011N.
Part-number decode
| Segment | Meaning | This SKU |
|---|---|---|
| Family | Honeywell Searchpoint Optima Plus point IR | Optima Plus |
| 2108N | Current detector prefix (legacy is 2108B) | 2108N |
| 4 / 5 | 4=Standard diffusion; 5=Sampling | 4 |
| Approval | 0=ATEX M25; 1=UL NPT; 2=FM NPT; 4=MED; 6=CCCF | 4 |
| RGC | 0=no remote gassing cell; 1=RGC fitted | 1 |
| Gas | 0=Hydrocarbon; 1=Ethylene | 1 |
| Output | N=4–20 mA; H=HART+4–20 mA | N |
Technical specifications
| Category | Transmitter / Standard |
|---|---|
| Description | Optima Plus Point IR Gas Detector,Ethylene,4-20mA,ATEX/IECEx/MED,M25,316SS,with dust barrier+weather housing+deluge shade+RGC |
| Gas | Ethylene |
| Output | 4–20 mA |
| Approvals | ATEX / IECEx / MED |
| Entries | M25 |
| Enclosure | 316 不锈钢 |
| RGC | yes |
| Principle | Point IR (dual source, dual beam) |
| Range | 0–100 %LEL (gas curve) |
| Ingress | IP66/IP67（探测器） |
Why this part number
Optima Plus dual-source dual-beam IR does not need oxygen and ignores silicones. 2108N4411N freezes approval, thread, gas curve and output. Ethylene calibration is not interchangeable; RGC lets you gas the cell without a cup, otherwise order the calibration adaptor.
Spares and mates
2108N4411N is Searchpoint Optima Plus Standard. The detector is 316SS point IR with the factory window or flow-housing kit. Matrix: product-2698. Do not substitute Sensepoint XCD cartridges or XNX personalities.
Typical applications
2108N4411N sits on offshore platforms, FPSO cargo pump rooms, refinery compressor halls and solvent print lines. Light hydrocarbons high, heavy vapours at the pit lip, optics out of wash-down.
Selection contrast
| P/N | Type | Gas | Cert | Output |
|---|---|---|---|---|
| 2108N4411H | Standard | Ethylene | MED | HART+4–20 mA |
| 2108N4410N | Standard | Hydrocarbon | MED | 4–20 mA |
| 2108N4401N | Standard | Ethylene | MED | 4–20 mA |
| 2108N4011N | Standard | Ethylene | ATEX | 4–20 mA |
| 2108N4001N | Standard | Ethylene | ATEX | 4–20 mA |
| 2108N4001H | Standard | Ethylene | ATEX | HART+4–20 mA |
| 2108N4011H | Standard | Ethylene | ATEX | HART+4–20 mA |
Installation and service
Mount 2108N4411N on a rigid 316 stand sized for the nameplate mass. Entries are M25 — do not retap. Land 4–20 mA on the fire-and-gas matrix; HART does not replace the trip pair. Keep the weather/deluge kit oriented so water cannot pond on the window. Gas with the Ethylene curve only.
FAQ
- Is 2108N4411N a catalytic LEL detector?
- No. 2108N4411N is Searchpoint Optima Plus point IR. Catalytic beads are Sensepoint XCD or XNX+MPD.
- Can I recertify 2108N4411N from hydrocarbon to ethylene in the field?
- No. This SKU is the Ethylene curve. Order sibling 2108N4410N instead of swapping filters.
- Does 2108N4411N include HART?
- 4–20 mA only; HART sibling is 2108N4411H. HART does not replace the trip pair.
- Can I convert Standard to Sampling on the lid?
- The window kits differ. 2108N4411N is Standard; the other style is —. Prefer a sampling SKU or flow-housing retrofit kit.
- Is 2108N4411N an XNX transmitter?
- No. 2108N4411N is the Optima detector head. Pairing with XNX needs a separate IR-personality transmitter.
- Can I retap the entries?
- No. 2108N4411N is ATEX / IECEx / MED / M25. Other approvals are sibling 2108N4011N.
Documents
Optima Plus datasheet 1 · Datasheet 2 · On-site part-number matrix
Availability and enquiry
Stock is lot-based. If 2108N4411N is out, jump to 2108N4411H / —.