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Fieldpiece CAT45 Combustion Analyzer
The Fieldpiece CAT45 is an innovative residential combustion analyzer for HVAC professionals to assess heating systems, draft pressure, and temperatures to support the overall fuel efficiency and safety of furnaces. The CAT45 gas analyzer accurately measures O2, CO, CO2, flue temperature, air temperature, and draft/gas pressure. Fieldpiece’s combustion analyzer with improved combustion analysis through optimized thermal processes helps technicians assess and monitor combustion data during installation, maintenance, and repairs. The Fieldpiece CAT45 does not include a printer.
The Fieldpiece CAT45K2 model does have a printer.
Main Benefits
- Accurately measure O2, CO, CO2, draft pressure
- Lower cost of ownership with four-year sensor warranty
- Large 5.5" touchscreen display with one-touch power on
- Field-replaceable sensors to maximize uptime
- Patent pending SensorVault technology prolongs sensor life
- Connect with Job Link System App, industry-leading 1000' wireless range
- USB-C chargeable while in use
SIMPLICITY REDEFINED
Featuring a high contrast, 5.5” touchscreen display, the CAT45 combustion gas analyzer makes it easy to view measurements, whether your job site is a dimly lit basement or bright rooftop. You can also save your customer data with dedicated fields for client information. If you require advanced diagnoses, a live trend report is available with O2, CO and CO2 readings.
BREAKTHROUGH INNOVATION
With a four-year sensor warranty, the Fieldpiece combustion analyzer CAT45 features patent pending SensorVault ™ technology that protects and prolongs the sensor life. We also maximize uptime on the job with field-replaceable sensors.
RELIABLE & RUGGED
The Fieldpiece CAT45 can tackle any job site conditions with its durable construction and rubberized casing. The magnetic back lets you work hands-free, and the padded hardline carrying case includes multiple inserts for accessories.
JOBSITE DOCUMENTATION
Seamlessly connect to Fieldpiece Job Link® System App to view trends, draft pressure, and customer details, all with industry-leading 1000’ wireless range. A wireless printer is also available for job sites that require documentation printouts.
What's Included:
- (1) CAT45 Combustion Analyzer (including probe)
- (2) Cones – RCONE3
- (10) Filters – RFC10
- (1) USB-C Charging Cable
- (1) Hard-Lined Carrying Case – ANC85
- (1) Operator’s Manual
- 1 year warranty
- 4 Year Sensor Warranty
Fieldpiece Combustion Analyzers
Fieldpiece CAT45 Combustion Analyzer
Fieldpiece CAT45K2 Combustion Analyzer with Wireless Printer
Fieldpiece CAT85 Combustion Analyzer with HydroCycle Pump
Fieldpiece CAT85K2 Combustion Analyzer HydroCycle Pump and Printer
Features
- Accurately measure O2, CO, CO2, draft pressure
- Lower cost of ownership with four-year sensor warranty
- Large 5.5” touchscreen display with one-touch power on
- Patent pending SensorVault™ technology prolongs sensor life
- 4 Year Gas Sensor Warranty
- Large Intuitive Touchscreen
- Powerful Trending
- Inline Water Trap
- Rechargeable Battery
- In-use USB-C Charging
- Field Replaceable Smart Sensors
- Job Link® System App Compatible industry-leading 1000’ wireless range
- Wireless Printer (CATPR) Compatible (not included)
- Durable Hard Lined Case
Specifications
| Fieldpiece CAT45 Combustion Analyzer | |||
| Sensors: | |||
| Measurement Parameter: | Sensor Type: | Response Time: | Max Overload: |
| Temperature | Type K rod thermocouple (fixed) | < 30 seconds (T90) | |
| Oxygen % | Electrochemical (replaceable) | < 30 seconds (T90) | 30% Oxygen |
| Carbon Monoxide PPM | Electrochemical (replaceable) | < 90 seconds (T90) | 10000 ppm Carbon Monoxide |
| Pressure (Probe) (Units: inWC, torr, Pa) | MEMS pressure sensor | < 10 seconds (T90) | 4.0 inWC will cause damage |
| Test Parameters: | |||
| Measurement Parameter: | Range: | Best resolution: | Accuracy: |
| Stack Temperature | 32 to 752°F; 0 to 400°C | 0.1°F; 0.1°C | ±2.5°F [32°F to 212°F], ±(3.6°F or 1.5%rdg) [213°F to 752°F]; ±1.4°C [0°C to 100°C], ±(2.0°C or 1.5%rdg) [101°C to 400°C] |
| Oxygen O2 | 0 to 21 vol.% | 0.1 vol.% | ±0.3 vol.% |
| Carbon Monoxide CO | 0 to 4000 ppm | 1 ppm | ±20 ppm [0 to 400 ppm], ±5%rdg [401 to 2000 ppm] ±10%rdg [2001 to 4000 ppm] |
| Draft Pressure | 0 to ±0.8 inWC | 0.01 inWC | ±0.02 inWC |
| CO Air Free (Calculated) | 0 to 4000 ppm | 1 ppm | |
| CO2 (Calculated) | 0 to CO2max vol.% | 0.1 vol.% | |
| Excess Air (Calculated) | 0 to 999% | ±0.1 vol.% | |
| Efficiency (Calculated) | 0 to 100% | 0.1% | |
| qA (Calculated) | 0 to 25% | 0.1% | |
| Dew Point (Calculated) | 32 to 212°F; 0 to 100°C | 0.1°F; 0.1°C | |
| Primary Air Temp | 32 to 212°F; 0 to 100°C | 0.1°F; 0.1°C | ±2.5°F [32°F to 212°F]; ±1.4°C [0°C to 100°C] |
| Ambient CO | 0 to 200 ppm | 1 ppm | ±20 ppm |
| General Technical Data | |||
| Display: | Touchscreen TFT LCD (5.5 in diagonal) | ||
| Probe Size: | 10.7 in (272 mm) length, 0.32 in (8.0 mm) diameter | ||
| Accuracy: | Stated accuracies at 23°C ±5°C, <75% R.H. | ||
| Battery Type: | 3.7 VDC (nominal), 6400mAh, non-replaceable | ||
| Battery Life: | 7 hours typical (pump running 80% of the time) | ||
| Charge Time: | < 7 hours typical @ 5V/2A DC power | ||
| Charging Port: | USB-C (Usable when connected to power.) | ||
| Memory: | 1000 jobs (approx.) | ||
| Warm Up Time: | 45 seconds (90 seconds near freezing) | ||
| Operating Environment: | 14°F to 104°F (-10°C to 40°C); < 75% RH (non-condensing) | ||
| Storage Temperature: | -4°F to 140°F (-20°C to 60°C); < 80% RH | ||
| Weight: | 39.5 oz (1120 g) with probe | ||
| Wireless Range: | 1000 feet (305 meters) | ||
| Fuel Types: | Natural Gas, Propane (LPG), Oil #2 (Light), Oil #6 (Heavy), Biofuel, Coal, Coal Town Gas, Coking Oven Gas, KOKS, Custom (x3) | ||
| Warranty: | 1 year (4 years sensors only) | ||
| Job Link® System Minimum: | BLE 4.0 devices running iOS 7.1 or Android™ Kitkat 4.4 Latest compatibility at www.fieldpiece.com | ||
| Printer: | Fieldpiece Wireless Thermal Printer (model CATPR) (not included) | ||
| Certifications: | FCC ID: 2ALHRCATX5, IC: Industry Canada, IC: 22518-CATX5, Waste Electrical and Electronic Equipment | ||
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Resources

Fieldpiece CAT45 Combustion Analyzer - Data Sheet

Fieldpiece CAT45 Combustion Analyzer - User Manual
Fieldpiece CAT45 Combustion Analyzer
Fieldpiece Combustion Analyzer - Tough Enough for Any Heating Job