Honeywell Searchpoint Optima Plus 2108B2051H – Legacy, Hydrocarbon, ATEX / IECEx / MED, HART+4–20 mA
2108B2051H is a legacy Honeywell Searchpoint Optima Plus point IR detector (Hydrocarbon), ATEX / IECEx / MED, HART+4–20 mA, 316SS. New projects should order a current 2108N SKU; keep this page for installed-base replacements.
Siblings: HART —, gas —, style —, approval —.
Part-number decode
| Segment | Meaning | This SKU |
|---|---|---|
| Family | Honeywell Searchpoint Optima Plus point IR | Optima Plus |
| P/N | Optima Plus Point IR Gas Detector,Hydrocarbon,HART+4-20mA,Marine MED (legacy P/N),316SS | 2108B2051H |
| Class | Transmitter Legacy | Legacy |
Technical specifications
| Category | Transmitter Legacy / Legacy |
|---|---|
| Description | Optima Plus Point IR Gas Detector,Hydrocarbon,HART+4-20mA,Marine MED (legacy P/N),316SS |
| Gas | Hydrocarbon |
| Output | HART+4–20 mA |
| Approvals | ATEX / IECEx / MED |
| Entries | M25 |
| Enclosure | 316 不锈钢 |
| RGC | no |
| Principle | Point IR (dual source, dual beam) |
| Range | 0–100 %LEL (gas curve) |
| Ingress | IP66/IP67（探测器） |
Why this part number
Legacy 2108B2051H shares the Optima Plus optics with the 2108N range, but approval kits and accessory packs changed. Do not write 2108B2051H into a new PID; read the nameplate before swapping the whole head versus a window/lamp kit.
Spares and mates
2108B2051H is Searchpoint Optima Plus Legacy. 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
2108B2051H shows up on offshore, FPSO pump-room and refinery compressor spare lists. Hydrocarbon SKUs are not ethylene curves.
Selection contrast
| P/N | Type | Gas | Cert | Output |
|---|---|---|---|---|
| 2108B2001N | Legacy | Hydrocarbon | ATEX | 4–20 mA |
| 2108B2001H | Legacy | Hydrocarbon | ATEX | HART+4–20 mA |
| 2108B2101N | Legacy | Hydrocarbon | UL | 4–20 mA |
| 2108B2101H | Legacy | Hydrocarbon | UL | HART+4–20 mA |
| 2108B2201N | Legacy | Hydrocarbon | FM | 4–20 mA |
| 2108B2201H | Legacy | Hydrocarbon | FM | HART+4–20 mA |
| 2108B2041N | Legacy | Hydrocarbon | CU-TR | 4–20 mA |
Installation and service
Mount 2108B2051H 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 Hydrocarbon curve only.
FAQ
- Is 2108B2051H a catalytic LEL detector?
- No. 2108B2051H is Searchpoint Optima Plus point IR. Catalytic beads are Sensepoint XCD or XNX+MPD.
- Can I recertify 2108B2051H from hydrocarbon to ethylene in the field?
- No. This SKU is the Hydrocarbon curve. Order sibling — instead of swapping filters.
- Does 2108B2051H include HART?
- Yes, HART+4–20 mA. HART does not replace the trip pair.
- Can I convert Standard to Sampling on the lid?
- The window kits differ. 2108B2051H is Legacy; the other style is —. Prefer a sampling SKU or flow-housing retrofit kit.
- Is 2108B2051H an XNX transmitter?
- No. 2108B2051H is the Optima detector head. Pairing with XNX needs a separate IR-personality transmitter.
- Can I retap the entries?
- No. 2108B2051H is ATEX / IECEx / MED / M25. Other approvals are sibling —.
Documents
Optima Plus datasheet 1 · Datasheet 2 · On-site part-number matrix
Availability and enquiry
Stock is lot-based. If 2108B2051H is out, jump to — / —.