Fieldpiece SOX3 Combustion Checker
by Fieldpiece Instruments
Entry-level combustion checker measuring %O2, calculating %CO2/%EA/efficiency with automatic pump, 8-ft hose, and custom fuel programming for HVAC techs.
5.7 - Good Custom · $513 8 Features
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www.fieldpiece.com
About This Product
The SOX3 is a combustion checker, not a full analyzer (no CO sensor, no draft measurement). It fills the role of a quick furnace tune-up tool for HVAC technicians who don't need full combustion analysis on every call. Field-replaceable O2 sensor.
Tool Specifications
- Sensor Type
- Electrochemical
- Accuracy Class
- Field Grade
- Measurement Range
- O2: 0–25%; Flue temp via thermocouple
- Ruggedness
- Field
- Battery
- 9V Alkaline
- Warranty
- 1 year
- Ecosystem
- standalone
- MeasureQuick Capabilities
- Combustion checker — manual entry supported via measureQuick
MeasureQuick Compatible
FSH Score Breakdown
Ease of Use 7.5
Features 4.5
Support 6.0
Value 6.5
Integrations 4.0
AI Capabilities 1.0
Customer Reviews
Features
8 features confirmed across
3categories· Showing confirmed capabilities only
Hardware Features3features
Magnetic MountingHands-free testing via magnetic backing and R-coneTouchscreen DisplayMAX/MIN/Real-time displayAuto ShutoffAuto-off
Compliance & Safety3features
Combustion AnalysisProgrammed fuel types: Natural gas, Oil #2, and PropaneCO2 Efficiency CalculationCalculates %CO2, %EA, and combustion efficiencyAirflow CalculationsCO2 Calculation
Equipment & Asset Management2features
Air Quality MonitoringO2 MeasurementAsset ManagementField-replaceable Oxygen Sensor
Pricing
- Model
- Custom
- Starting at
- $513
- Notes
- ~$513 retail. Combustion checker with auto pump. Measures O2; calculates CO2, excess air, combustion efficiency.
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