24/7 Chemical & Biological Detection System
A mounted detector for gas and aerosol that provides continuous 24/7 monitoring for land or naval assets. Chemical and biological detection take place simultaneously in one two-in-one sensor, so there is no mode to switch, and alarm and sampling are fully automatic, with no action required from the operator.
Proengin describes the AP4C-FB as a two-in-one sensor: chemical and biological detection take place simultaneously, so there is no need to switch between the biological and chemical mode. Here is what each side covers.
A broad range of conventional and unconventional chemical threats, including chemical warfare agents, toxic industrial material and non-traditional agents such as Novichok.
Simultaneous · no mode switching
Biological threats covered alongside the chemical ones: virus, bacteria and spore, monitored at the same time as the chemical channel.
Detection, not identification. The biological side is specified by particle size (2-10 micron particles); it detects these threats and does not identify or name a specific biological agent.
External & airtight sampling, running 24/7.
Chemical and biological detection take place simultaneously.
Alarm and sampling is fully automatic and requires no action from the operator.
Internal memory, 530 hours loop recording.
This combined design results in lower procurement costs and less system complexity.Proengin
Proengin built the AP4C-FB for continuous 24/7 monitoring of land or naval assets. The photos below are illustrative only.
Illustrative image
Illustrative imageProengin lists flexible & easy integration among the key features. These are the numbers an integrator needs.
RS-485 interface
Internal memory, 530 hours loop recording
External & airtight sampling
Flame spectrometry
Main detector with visualization and control module (VCM).
Main detector without visualization and control module (VCM).
Proengin offers deliverables from full system integration to ready to mount kit, plus integration of the AP4C-FB system to the end-user platform and prepaid maintenance and extended warranty options available upon initial acquisition. These are Proengin offerings; request a quote to discuss your requirement.
The AP4C-FB is not the same unit as the AP4C-F or the handheld AP4C. The FB adds biological detection to a fixed housing; the F is the chemical-only fixed version; the AP4C is the handheld chemical detector.

Combined chem-bio detection in one housing for land or naval assets.
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The chemical-only fixed variant of the same housing family, for when biological detection is not required.
View AP4C-F
Proengin lists the AP4C kit, a mobile handheld detector with gas and liquid sampling capability, as an accessory for dismounted personnel.
View AP4C| Detection | |
|---|---|
| Technology | Flame spectrometry |
| Detection range | CWA, TICs & TIMS, NTAs, Novichok, Binary agent, Precursor, Virus, Bacteria, Spore |
| Chemical sensitivity | sub-ppm range |
| Biological sensitivity | 2-10 micron particles |
| Detection list | |
| Chemical |
|
| Biological |
|
| Operation | |
| Monitoring | 24/7 continuous detection |
| Alarm & sampling | Fully automatic; requires no action from the operator |
| Power & data | |
|---|---|
| Communication | RS-485 interface |
| Data storage | Internal memory, 530 hours loop recording |
| Key features | |
| Sampling | External & airtight sampling |
| Integration | Flexible & easy integration |
| Dimensions & environment | |
|---|---|
| Height | 606mm / 23.85” |
| Width | 400mm / 15.75” |
| Conditions | Performs under harsh conditions (dust, humidity, temperature) |
| Kit options (Proengin) | |
|---|---|
| AP4C-FB system | Main detector with visualization and control module (VCM) |
| AP4C-FB detector | Main detector without visualization and control module (VCM) |
| Accessories & services (Proengin) | |
| AP4C kit | Mobile handheld detector with gas and liquid sampling capability for dismounted personnel (AP4C page) |
| Integration | Integration of the AP4C-FB system to the end-user platform |
| Maintenance | Prepaid maintenance and extended warranty options available upon initial acquisition |
Two-page product datasheet.
PDF · Proengin ServiceOEM-certified service and support on every product we deliver. When a repair or calibration falls outside our in-house scope, we coordinate directly with the third-party manufacturer and manage the logistics end to end.
Learn more RelatedNeed chemical detection only? See the fixed, chemical-only AP4C-F.
View productFarrWest is a pre-approved vendor on BuyBoard and Purchasing Cooperative of America (PCA). Government agencies can buy on competitively-bid cooperative contracts, with no lengthy RFP.
How co-op buying worksServiceOEM-certified service and support on every product we deliver: functional checks and certified calibration on the manufacturer’s required cycle, back in service in 48–72 hours typical.
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View productTell us about the platform or site you need to protect and request a quote about the AP4C-FB.