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REMS Pro-Electronic-Gas-Leak-Detector-Detect-GS4

Germany
REMS
Detect GS4

Pro Electronic Gas Leak Detector

German lightweight gas leak detector|Only 78 g|Quick-change sensors|For combustible gas / refrigerant / ammonia / high-purity hydrogen|Complies with EU F-Gas and EN 14624 high-sensitivity standards|One-touch manual zeroing|20 cm flexible extension probe included.

Product Features
  • Multi-Gas Detection: Interchangeable sensor heads allow detection of different gases with one main unit.
  • German High-Sensitivity Standard: Complies with EU F-Gas 2024/573 and EN 14624:2020 requirements.
  • Quick-Change Sensors: Sensor heads are available for combustible gas, refrigerant, ammonia, and high-purity hydrogen.
  • Multi-Level Alarm: Four-color LED visual alert and audible alarm make leak detection more intuitive.
  • One-Touch Manual Zeroing: Helps eliminate background concentration interference and pinpoint leak sources.
  • Automatic Warm-Up: Improves detection stability and jobsite efficiency.
  • 20 cm Flexible Extension Probe: Allows access to narrow, hidden, or hard-to-reach inspection points.
  • Optional Lighting Module: GS4-LED can be used as an inspection light for confined areas.
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#HVAC Tools

Model Specifications

SKU
Model
Description
Weight
Remarks
611095
Detect GS4 Set F
Combustible gas version: Main unit, 20 cm flexible extension probe, quick-change sensor, 2 × 1.5V AAA batteries, and original durable soft storage pouch.
78 g
611096
Detect GS4 Set R
Refrigerant version: Main unit, 20 cm flexible extension probe, quick-change sensor, 2 × 1.5V AAA batteries, and original durable soft storage pouch.0
78 g
611310
GS4-F
Combustible gas sensor
611312
GS4-R
Refrigerant sensor
611311
GS4-S
Ammonia sensor
611313
GS4-H
High-purity hydrogen sensor
611314
GS4-LED
LED lighting module
611213
20 cm flexible extension probe.

Original sensitivity test data is available upon request.

Product Details

REMS Detect GS4 Gas and Refrigerant Leak Detector
Product Overview
REMS Detect GS4|Gas and Refrigerant Leak Detector

REMS Detect GS4 is an ultra-light handheld leak detector for technical facilities, gas pipelines, pressure vessels, refrigeration and air-conditioning equipment, cold storage systems, and automotive cooling systems. The main unit weighs only 78 g and can be used with a 200 mm flexible extension probe and quick-change sensors to reach narrow spaces, dead corners, and internal equipment areas for efficient leak detection.

Specifications
Product Specifications
Product Type
Handheld gas / refrigerant leak detector
Body Design
Ultra-light handheld design, 214 mm main unit length, only 78 g
Probe Configuration
200 mm flexible extension tube, tool-free installation, bendable for hard-to-reach areas
Sensor System
Color-coded quick-change sensors, directly attachable to the main unit or extension tube
Power Supply
2 × 1.5V AAA batteries
Power Saving
10-minute automatic shut-off
The Key to Leak Detection Is Not Only Whether It Reacts — It Is Whether It Can Reach the Places Where Leaks Actually Occur

Gas and refrigerant leaks often occur around joints, valves, inside equipment, or in areas that are difficult to see. REMS Detect GS4 combines a lightweight main unit, extendable probe, and gas-specific quick-change sensors, helping technicians identify suspected leak points more efficiently instead of relying only on visual checks or soap water testing.

Applications
Applications

Suitable for leak detection in industrial pipelines, technical facilities, gas lines, pressure vessels, cold storage systems, air-conditioning equipment, and automotive cooling systems. Different sensors support combustible gas, refrigerant, ammonia, and high-purity hydrogen detection needs.

Industrial Pipelines and Technical Facilities

Suitable for gas pipelines, pressure vessels, equipment piping, and industrial safety inspections.

Refrigeration and Air-Conditioning Systems

Can be used for refrigerant leak detection in cold storage systems, air-conditioning equipment, and automotive cooling systems.

REMS Detect GS4 Sensors and Probe
Sensor Options
Sensor Models
GS4 uses color-coded quick-change sensors. Each sensor is designed for a specific detection task, so the correct version should be selected according to the actual application.
GS4-F
Combustible Gas Sensor
Detection Type
Combustible gases
Supported Gases
Butane C4H10, methane CH4, propane C3H8, hydrogen H2
GS4-R
Refrigerant Sensor
Detection Type
Refrigerants
Supported Refrigerants
R-22, R-32, R-134a, R-152a, R-290, R-404a, R-407c, R-410a, R-507a, R-600a, R-1234yf, and more
Regulation
Complies with EU F-Gas Regulation (EU) 2024/573
GS4-S
Ammonia Sensor
Detection Type
Ammonia
Supported Gas
NH3
GS4-H
High-Purity Hydrogen Sensor
Detection Type
High-purity hydrogen
Supported Gas
H2
Key Function
Designed to exclude interference from other combustible gases
Features
Product Features
Built around an ultra-light main unit, flexible extension probe, quick-change sensors, and multi-gas support, GS4 is suitable for service technicians, refrigeration and air-conditioning work, industrial equipment inspection, and gas pipeline leak detection.
78 g Ultra-Light Handheld Design

The lightweight main unit reduces fatigue during long inspections, overhead work, or confined-space operation.

200 mm Flexible Extension Probe

Bends into dead corners and reaches behind equipment, inside units, and around pipework.

Quick-Change Sensors

Sensor modules can be changed according to gas type and attached directly to the main unit or extension tube.

Color-Coded Sensor System

Color coding helps reduce the risk of selecting the wrong sensor in the field.

Automatic Power Saving

The 10-minute automatic shut-off function helps extend battery life.

Multi-Scenario Leak Detection

Supports combustible gas, refrigerant, ammonia, and high-purity hydrogen detection tasks.

Product Video
Product Video