Searchpoint Optima Plus Point Infrared Gas Detector
Infrared Transmitters


Infrared point hydrocarbon gas detector certified for use in potentially explosive atmospheres
Features & Benefits
Over 100,000 units installed worldwide
Improved reliability
Fast speed of response
Quick Specs
Material: 316 stainless steel
Response time: T50 < 3 seconds, T90 < 4 seconds (methane)

Operational and certified: -40° to + 65°C temperature range

Product Overview

With over 40 years experience in the design, manufacture, installation and maintenance of point infrared gas detection, Honeywell Analytics currently has a worldwide installed base of over 100,000 infrared point hydrocarbon gas detectors in a wide spectrum of applications from light industrial to the most demanding of offshore environments.

Searchpoint Optima Plus is an infrared point Hydrocarbon gas detector certified for use in potentially explosive atmospheres. The unit’s infrared detection principle offers the fastest speed of response and fail-to-safe operation, ensuring that your plant is compliant, your personnel are protected and your production process can deliver maximum uptime. Reduced routine maintenance, when compared with conventional electro-catalytic based gas detectors, provides low ongoing cost of ownership. The development of advanced internal fault diagnostics and false alarm rejection algorithms ensures that the Searchpoint Optima Plus delivers the highest level of operational integrity.

Typical Applications 
Offshore oil and gas platforms, floating production storage and offloading (FPSO) vessels, tankers, onshore oil and gas terminals, refineries, LNG/LPG bottling plants, gas compressor/metering stations, gas turbine power plants, solvent printing and coating plants.

Over 100 gas and vapor calibrations available. For a list of gases and vapors that Searchpoint Optima Plus can detect, contact your local distributor.

Additional Features and Benefits:

Why Searchpoint Optima Plus is the right choice...

Experience gained from over 100,000 units installed worldwide
Improved reliability
Optional HART® over 4-20mA output
Can detect a wide range of hydrocarbon gases including solvents
Increased reliability with no moving parts
Increased stability from self compensating optics
Immune to long term component drift
Remote functional gas test facility
Certified for North American and European Hazardous areas
Increased false alarm rejection
Increased uptime with contaminated optics warning
Dynamic Heating Control ensures condensation free optics
No undetected failures
Improved diagnostics
Integral event logging
Reduced power consumption
Certified to many hazardous area classification schemes including: UL, CSA, ATEX, IECEx and more
Why Infrared?

Failsafe operation
Fast speed of response
Reduced routine maintenance
Immune to catalytic poisons
Long operating life

Works in inert atmospheres

Advanced infrared
point gas detector
Failsafe Hydrocarbon
Gas Detection
1. Optics Block
The 4-channel (dual compensated) optics-block is the
heart of the Searchpoint Optima Plus. It is specifically
designed to compensate for changes in the external
environment similar to 2-channel designs, but also
compensates for long term component drift such as
infrared sources and detectors. This provides the
Searchpoint Optima Plus with the most stable optics
design possible.
2. Microprocessor
The microprocessor controls the operation of the
Searchpoint Optima Plus. The signal processing
and algorithms provide a new dimension in false
alarm rejection delivering the highest level of
operational integrity.
3. Heated Optics Plus Dynamic
Heating Control
Heated optic components, monitored via smart
electronics, eliminate condensation build up with power
saving features.
4. Remote Gassing Cell
Factory fitting of this optional gassing cell within
the optical path allows the remote injection of
functional test gas to validate the performance of
a Searchpoint Optima Plus.
Remote Gas Sampling Systems
For monitoring remote or inaccessible locations
Searchpoint Optima Plus can be fitted with a flow housing
and engineered into a gas sampling system. Single-point
and multi-point systems are available for both hazardous
and non-hazardous areas.

Searchpoint Optima Plus Specification
Measuring Range 0-100% LEL, wide selection of Hydrocarbon gas and vapour calibrations. Different measuring ranges and solvent calibrations available for
specialist applications
Signal Output 4-20mA autosensing sink or source
Inhibit 1-3mA (Default 2mA)
Warning 0-6mA (Default 3mA *)
Fault 0mA (HART® units adjustable to 1mA)
Over Range 20-21.5mA (Default 21mA)
Digital Output Optional Multidrop Modbus RS485 (via XNX, Optional HART® over 4-20mA output (HART® version 7)
Material 316 stainless steel
Weight 1.6kg
Accuracy
Optima Plus (Hydrocarbon) Baseline < ±1% FSD, 50% FSD <±2% FSD
Optima Plus (Ethylene) Baseline < ±2% FSD, 50% FSD <±3% FSD
Repeatability < ±2% FSD at 50% FSD
Linearity < 5% FSD
Response Time T50 < 3 seconds, T90 < 4 seconds (methane)
Operational and Certified** -40°C to +65°C temperature range
**CU-TR-EX (Russia) Approval – XTC Version, Certified Temperature Range -60°C to + 65°C
Long Term Stability
(as defined in
EN 60079-29-1)
Baseline Methane 100 %LEL Range: ≤ ± 2 %FSD
Ethylene 100 %LEL Range: ≤ ± 4 %FSD
50 %FSD Methane 100 %LEL Range: ≤ ± 4 %FSD
Ethylene 100 %LEL Range: ≤ ± 5 %FSD
Drift Over Temperature
Range (-40 °C to 65 °C)
Baseline ≤ ± 2 %FSD
50 %FSD Methane 100 %LEL Range: ≤ ± 0.131 %FSD per °C
Ethylene 100 %LEL Range: ≤ ± 0.078 %FSD per °C
Variation with Pressure 0.1% (of reading) per mbar
Power Supply 18-32Vdc (24Vdc nom), < 4.5W max
Environmental Protection IP 66 / 67
Diagnostics Via certified Hand-held Interrogator, XNX or optional HART® communications
(and Re-calibration)
Safety Approvals ATEX: Baseefa13ATEX0296X
 II 2 GD Ex d op is IIC Gb Ex tb IIIC Db
T96°C (Tamb -40°C to +65°C)
T86°C (Tamb -40°C to +55°C)
IP 66/67
UL / CSA: Class 1, Div 1, groups B, C, and D (-40°C to +65°C)
IECEx: II 2 GD Ex d op is IIC Gb Ex tb IIIC Db T86°C (Tamb -40°C to +55°C) or T96°C (Tamb -40°C to +65°C) IP66/67
CU-TR-EX (Russian Customs Union) - XTC Version 1Ex d op is IIC T5/T4 Gb X (Tamb -60°C to +65°C)
Performance Approvals EN 60079-29-1 (BVS 03 ATEX G 016 X), CSA C22.2 152., FM ANSI/ISA-12.13.01.,Russian Pattern Approval (Metrology) - XTC Version ***
Functional Safety IEC61508 Safety Integrity Level 2
EMC Compliance EN 50270:2006
Software EN 50271:2010
Marine Approvals Marine Equipment Directive (MED), type approvals from DNV, BV, ABS, Lloyd’s Register
 * Note for ATEX compliance the warning value should not be set between 3 and 5mA
 *** Please refer to manual for full information