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KWJ Engineering

Interlink Technology Platform

Gas Detection Solutions

Advanced gas detection instrumentation and electrochemical sensing programs for safety, environmental monitoring, and OEM development.

Core Focus

Gas Detection and Environmental Monitoring

Delivery Model

Custom Engineering + Product Integration

KWJ Engineering logo

Multi-decade gas detection R&D and instrumentation platform. Acquired by Interlink Electronics in 2022.

Product Catalog

Interlink Electronics designs and manufactures gas detection solutions across wearable detectors, portable instruments, fixed and inline multi-gas monitoring systems, bare electrochemical sensors for OEM integration, and signal-conditioned OEM sensor modules. Products cover 14+ target gases including CO, O3, H2S, H2, CO2, CH4, NO2, and more.

These product programs are typically engagement-led. Contact the team for pricing, custom configurations, and volume enquiries.

Wearable Instruments

Wearable Instruments

4 products

Personal gas detectors small enough for a keychain or phone case, providing real-time exposure monitoring, dosimetry, and audible/visual alarms for worker safety and personal health.

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Pocket CO 300

Wearable Instruments

Pocket CO 300

The world's smallest carbon monoxide detector, alarm, and dosimeter — monitors low CO levels, collects max/average dosimetry data, and fits on a keychain.

CO
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Pocket H2S 300

Wearable Instruments

Pocket H2S 300

The world's smallest and most affordable hydrogen sulfide detector — 0.0 to 50.0 ppm range with dual alarm levels and 8-hour TWA monitoring.

H2S
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Pocket Ozone

Wearable Instruments

Pocket Ozone

Compact, portable ozone detection for air quality monitoring — ideal for ozone treatment areas, HVAC systems, and personal safety monitoring.

O3
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SPARROW CO & Air Quality Monitor

Wearable Instruments

SPARROW CO & Air Quality Monitor

Smartphone-connected wearable CO and air quality monitor with SPEC Sensors electrochemical sensor, real-time graphing, location mapping, and customizable health alerts.

CO
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Portable Instruments

Portable Instruments

2 products

Handheld and field-portable gas detection instruments for compressed air testing, multi-gas analysis, and on-site safety monitoring in industrial and environmental applications.

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A285 Portable Multi-Gas Instrument

Portable Instruments

A285 Portable Multi-Gas Instrument

Portable multi-gas detector for CO, hydrogen, biogas, and CO2 in a weather-resistant Pelican case with AC/DC power and sample flow regulation.

COH2CO2Biogas
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A356 Portable CO Monitor

Portable Instruments

A356 Portable CO Monitor

Portable carbon monoxide monitor with electrochemical sensor for field safety checks, indoor air quality surveys, and compressed air testing.

CO
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Fixed Instruments

Fixed Instruments

5 products

Wall-mounted and surface-mounted continuous monitoring systems for facility safety, biogas plants, compressed air quality, and indoor environmental monitoring with alarm outputs.

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A360 Fixed CO & O2 Monitor

Fixed Instruments

A360 Fixed CO & O2 Monitor

Wall-mounted fixed monitor for continuous carbon monoxide and oxygen detection — 115 VAC, dust-resistant, with alarm relay and digital display.

COO2
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A345 Fixed Multi-Gas Monitor

Fixed Instruments

A345 Fixed Multi-Gas Monitor

Fixed multi-gas monitoring system for biogas, CO2, and methane detection in biogas plants, landfills, and wastewater treatment facilities.

CO2CH4Biogas
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A241 Fixed Multi-Gas Monitor

Fixed Instruments

A241 Fixed Multi-Gas Monitor

Fixed monitoring system for methane, H2S, and biogas applications — designed for wastewater, biogas digesters, and industrial gas safety.

CH4H2SBiogas
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A383 Fixed O2, Methane & Biogas Monitor

Fixed Instruments

A383 Fixed O2, Methane & Biogas Monitor

Fixed instrument for continuous oxygen, methane, and biogas monitoring in agricultural, industrial, and environmental settings.

O2CH4Biogas
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A401 Fixed Multi-Gas Monitor

Fixed Instruments

A401 Fixed Multi-Gas Monitor

Comprehensive fixed monitoring for methane, H2S, CO2, and biogas — designed for demanding multi-gas environments requiring continuous surveillance.

CH4H2SCO2Biogas
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Inline Instruments

Inline Instruments

3 products

Instruments designed for continuous monitoring of compressed air and gas supply lines, with digital displays, alarm relays, and 4-20mA analog outputs for process integration.

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A316 Inline CO Monitor and Alarm

Inline Instruments

A316 Inline CO Monitor and Alarm

Inline carbon monoxide monitor and alarm for compressed-air systems, with 115 VAC power, dust-resistant surface-mount enclosure, digital ppm display, internal alarm relay, and 4-20mA output terminals.

CO
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A409 Inline CO Monitor

Inline Instruments

A409 Inline CO Monitor

Inline carbon monoxide monitor for compressed air and gas line applications with continuous digital monitoring and alarm capability.

CO
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A333 Inline O2 & N2 Monitor

Inline Instruments

A333 Inline O2 & N2 Monitor

Life-safety inline alarm for bottled gas cylinders (O2, N2, Halocarbon, air) — used in hospitals, clinics, nursing homes, and laboratories.

O2N2
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Electrochemical Gas Sensors

Electrochemical Gas Sensors

4 products

Bare electrochemical sensor elements in MFS, R-Series, and T-Series form factors for OEM integration, instrument design, and research applications detecting CO, H2S, NO2, NO, and more.

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CO-MFS Electrochemical CO Sensor

Electrochemical Gas Sensors

CO-MFS Electrochemical CO Sensor

Three-electrode electrochemical carbon monoxide sensor — 0 to 1,000 ppm range, 15.9 x 27.9 mm, 5 grams, <60 second response time.

CO
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H2S-MNS Electrochemical H2S Sensor

Electrochemical Gas Sensors

H2S-MNS Electrochemical H2S Sensor

Three-electrode electrochemical hydrogen sulfide sensor — 0 to 500 ppm range, same compact MFS/MNS form factor at 15.9 x 27.9 mm.

H2S
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NO2-MNS / NO2-SNL Electrochemical NO2 Sensor

Electrochemical Gas Sensors

NO2-MNS / NO2-SNL Electrochemical NO2 Sensor

Three-electrode electrochemical nitrogen dioxide sensor — 1 to 10 ppm range in the compact MNS form factor for OEM and instrument integration.

NO2
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3ET T-Series Nanotechnology Sensors

Electrochemical Gas Sensors

3ET T-Series Nanotechnology Sensors

Ultra-compact nanotechnology-based sensors — 0.57-inch square footprint, under 2 grams, T90 response under 30 seconds, developed from TTI merger.

COH2S
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OEM Sensor Modules

OEM Sensor Modules

2 products

Signal-conditioned sensor modules combining electrochemical sensing elements with ultra-low-power analog front ends, producing calibrated voltage outputs for seamless OEM integration.

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ULPSM-CO Sensor Module

OEM Sensor Modules

ULPSM-CO Sensor Module

Ultra-Low Power Sensor Module for carbon monoxide — combines a SPEC Sensors electrochemical element with an analog front end producing linear voltage output at microwatt power.

CO
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ULPSM-CO V2 Sensor Module

OEM Sensor Modules

ULPSM-CO V2 Sensor Module

Second-generation Ultra-Low Power CO Sensor Module with improved signal processing and smaller form factor for next-generation OEM integration.

CO
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