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Brand
SIEGER
Sieger is a British gas detection brand that began in 1959 with Joshua Sieger's low-power catalytic bead sensor and became J&S Sieger Ltd in 1961. Zellweger bought the company in 1979, and Honeywell acquired it in 2005, so Sieger products are now part of Honeywell Analytics in Poole, UK. Searchpoint Optima Plus is its widely installed infrared point gas detector. Seven Star LLC sources and supplies the Sieger Optima Plus point gas detector and its current equivalent for sites in Oman.
Read the full brand profile- 1 product
- 1 category
Brand profile
About SIEGER
- Headquarters
- Poole, United Kingdom
- Speciality
- Gas detection
- Listed with us
- 1 product
SIEGER products by category
Sieger is a British gas detection brand that began in 1959 with Joshua Sieger's low-power catalytic bead sensor and became J&S Sieger Ltd in 1961. Zellweger bought the company in 1979, and Honeywell acquired it in 2005, so Sieger products are now part of Honeywell Analytics in Poole, UK. Searchpoint Optima Plus is its widely installed infrared point gas detector.
Seven Star LLC sources and supplies the Sieger Optima Plus point gas detector and its current equivalent for sites in Oman.
SIEGER company profile
| Founded | 1959, United Kingdom |
|---|---|
| Founder | Joshua Sieger |
| Ownership | Honeywell, since 2005 |
| Location | Poole, UK |
| Product families | Searchpoint Optima Plus infrared detectors, catalytic gas sensors, gas detection controllers |
Milestones
- 1959: EIC-Sieger is incorporated.
- 1961: Becomes J&S Sieger Ltd.
- 1979: Zellweger acquires Sieger.
- 2005: Honeywell acquires the business.
Sieger Optima Plus gas detector
The listed item is the Sieger Optima Plus, part number 2108B2001 (shown as 2108B2001N on some labels), known in current catalogs as the Searchpoint Optima Plus. It is a point infrared detector for flammable hydrocarbon gases and vapors. Infrared measurement is not affected by catalyst poisons and does not need oxygen, which explains its long use on oil and gas facilities, petrochemical units and tank farms in the GCC.
Ordering a Sieger gas detector: what we need
Send the complete part number from the label, including any letter at the end, since versions of this detector differ in approval and cable entry thread. Add the target gas, a nameplate photo, and the accessories in use, such as the weather protection, junction box or duct mounting kit. Tell us which controller or control system input the detector is wired to.
Facts checked against Honeywell Analytics history articles, October 2026.
Request a Quote for SIEGER Products
Looking for SIEGER parts not listed here, or pricing for a project? Send us the part numbers and quantities. Seven Star LLC sources genuine SIEGER products for customers across Oman and the GCC and replies with a formal quotation.
- Genuine OEM products
- Supply across Oman & the GCC
- Formal quotation from our sales team
Free, no-obligation quotation · takes about 1 minute
Other enquiries: [email protected] · WhatsApp
Frequently Asked Questions
Is the Sieger Optima Plus the same as the Honeywell Searchpoint Optima Plus?
Yes, it is the same detector line. Sieger was the original brand, and the Searchpoint Optima Plus is supplied today under the Honeywell name. A Sieger part number such as 2108B2001 can be checked against the current manufacturer documentation to find the version that matches its approval and entry thread.
How do I identify the right Sieger gas detector version from the label?
Read the full part number, the serial number and the certification marking from the label on the detector body. The part number identifies the version, and the calibration record shows the gas the unit was set up for. Send these with a photo, because similar-looking units can differ in all three points.
Which gases does the Optima Plus detect?
It detects hydrocarbon gases and vapors by infrared absorption, and the gases it can be calibrated for are listed in the manufacturer's manual. It does not respond to hydrogen, which has no suitable infrared absorption, so hydrogen areas need a different sensing principle. State the target gas and range in the inquiry.
Who makes Sieger gas detectors now?
Sieger is part of Honeywell Analytics, which Honeywell formed after buying Zellweger Analytics in 2005. The Searchpoint Optima Plus is still sold under Honeywell.
Is Seven Star LLC a distributor of Sieger or Honeywell gas detection?
No. Seven Star LLC is an independent supplier. We source Sieger-designated and current Honeywell gas detectors through commercial channels, check the part number against the manufacturer's documentation, and provide the manufacturer's datasheet and certificates with the order on request. We state the origin of each item in our offer.