Sewerin EX-TEC PM 400 Multi-Gas Detection System
The Sewerin EX-TEC PM 400 is a compact, portable multi-gas detector designed for those requiring reliable gas detection in demanding environments. Engineered by Sewerin, a leading manufacturer of leak detection technology, this device combines precision detection with user-friendly operation.
Product Overview
The EX TEC PM 400 provides immediate alerts for dangerous gas concentrations, helping protect workers and facilities from potential hazards. Its responsive sensors can detect multiple gas types, making it an essential safety tool for utility companies, network operators, fire services, plumbers, and other technical personnel.
With certified explosion protection and a rugged design built for daily use in challenging conditions, the EX-TEC PM 400 delivers the performance professionals depend on.
Ex Tec Key Features and Advantages
Multi-Gas Detection Capabilities
-
Monitors up to four different gas types simultaneously when fully equipped
- Standard methane detection with selectable calibration for propane, nonane, acetylene, hydrogen, and JFUEL
- Optional sensors for carbon dioxide, carbon monoxide, and oxygen
- Measuring ranges optimized for workplace safety applications
Superior Ergonomics and Usability
- Non-slip, partially rubberized housing fits securely in the hand for comfortable extended use
- High-contrast 2.5″ transflective screen remains readable even in bright sunlight
- Intuitive 4-key control panel allows easy navigation through all functions
- Dedicated power button prevents accidental activation of other functions
- One-handed operation is suitable for both right and left-handed users
- Practical belt clip and short probe for ergonomic handling
Advanced Safety Features
- Audible and visual alerts with pre-alarm and main alarm functions
- Intelligent device inspection wizard simplifies regular testing
- A transparent seal on the dust filter allows quick identification of contamination
- Pump alarm triggers if the hydrophobic filter contacts water
- Certified passive and active explosion protection (TÜV 17 ATEX 171969 X)
Flexible Power Management
- Operates with standard AA-size rechargeable NiMH batteries or disposable alkaline batteries
- Up to 11 hours of continuous operation on a single charge (standard configuration)
- Approximately 5 hours of charging time for a full battery recharge

Safety professional using EX-TEC PM 400 to detect gas leaks in an industrial setting
Technical Specifications
| Physical Characteristics · Dimensions | 93 × 47 × 165 mm (without belt clip); 93 × 65 × 165 mm (with belt clip) |
|---|---|
| Physical Characteristics · Weight | Approximately 500 g (523 g with belt clip, varies with sensor configuration) |
| Physical Characteristics · Protection rating | IP65 (dust-tight and protected against water jets) |
| Physical Characteristics · Display | Monochromatic TFT, 380 × 224 pixels, 56 × 33 mm viewing area |
| Operating Parameters · Operating temperature | -20°C to 40°C |
| Operating Parameters · Storage temperature | -25°C to 60°C (without EC sensor); -25°C to 40°C (with EC sensor) |
| Operating Parameters · Atmospheric pressure range | 700 to 1200 hPa |
| Operating Parameters · Relative humidity | 5% to 95% r.h., non-condensing |
| Operating Parameters · Pump capacity | >150 mbar vacuum; >10 l/h volume flow |
| Sensor Specifications |
|
| Certification |
|
Technical Literature & Downloads

EX-TEC PM 400 complete kit with carrying case and accessories for gas detection
Applications
Industry Applications
Gas Utility and Pipeline Operations
- Gas leak detection in distribution networks
- Safety verification during maintenance operations
- Monitoring gas concentrations during repairs
- Pre-entry testing of confined spaces
Industrial Safety
- Detection of leaks in gas and heating systems
- Monitoring gas concentrations near acetylene welding systems
- Safety verification around industrial equipment
- Hazardous area assessments
Fire and Emergency Services
- Gas presence verification during emergency response
- Safety monitoring during incident management
- Building safety checks following gas-related incidents
- Preventive safety inspections
Aviation and Specialized Applications
- Verification of gas-free conditions in aviation fuel tanks
- Safety calibration with nonane
- Hydrogen detection in battery storage areas
- Monitoring gas concentrations in specialized industrial settings





