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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.

A401 Fixed Multi-Gas Monitor

Fixed Instruments

CH4H2SCO2Biogas

A401 Fixed Multi-Gas Monitor

The A401 is a comprehensive fixed multi-gas monitoring system capable of detecting methane, hydrogen sulfide, carbon dioxide, and biogas simultaneously. Designed for the most demanding multi-gas environments including biogas plants, wastewater facilities, and industrial process areas.

  • Four-gas detection: CH4, H2S, CO2, biogas
  • Comprehensive continuous monitoring
  • Designed for demanding environments
  • Alarm relay and analog outputs

Contact for Pricing

Request technical and commercial details

Interlink product programs are typically scoped and quoted based on application context, deployment requirements, and expected production profile. Submit this form and the team will follow up with pricing and fit guidance.

Include in your request:

  • Application environment and target gas profile
  • Expected operating range and integration constraints
  • Prototype timeline and estimated annual volume
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