Built Tough for Aussie Heating Jobs

If you’re an HVAC tradie, installer, or facility manager who’s serious about getting combustion tuning right the first time, the Fieldpiece CAT85 is the tool you’ve been waiting for. Designed for Australia’s tough jobsite conditions — from Darwin’s tropical humidity to Melbourne’s winter chill — this all-in-one combustion analyser delivers fast, accurate readings and hassle-free documentation with the included wireless printer.

Helpful Links

• Brochure
• Analyzer Manual
• Printer Manual

Specifications

• Build: Rugged housing with rubberised edges and magnetic back
• Display: 5.5" touchscreen TFT LCD
• Probe: 272 mm length, 8 mm diameter Type K rod thermocouple
• Weight: 1.255 kg with probe
• Battery: 3.7 V 6400 mAh rechargeable, approx. 7 hrs runtime
• Charging: USB-C, under 7 hrs with 5 V/2 A supply
• Memory: ~1000 jobs
• Warm Up: 45 sec typical, 90 sec near freezing
• Operating Temp: -10°C to 40°C, <75% RH
• Wireless Range: up to 305 m with Job Link
• Warranty: 1 yr instrument, 4 yrs sensors

Sensor Performance

• Temperature: Type K thermocouple, T90 <30s
• Oxygen: Electrochemical replaceable, T90 <30s, overload 30% O₂
• Carbon Monoxide: Electrochemical replaceable, T90 <90s, overload 10,000 ppm CO
• Draft Pressure Probe: Piezoresistive, T90 <10s
• Manometer Ports: Silicon sensors, T90 <10s

Features & Benefits

Accuracy & Safety

High-accuracy O₂ and CO sensors ensure compliance and optimal performance. The unit features built-in overload protection for pressure inputs and displays live draft pressure during testing for faster diagnostics.

SensorVault™ Technology: Extends sensor life by mechanically sealing the sensors when the unit is turned off, protecting them from ambient air and degradation during storage.

Durability & Worksite Readiness

• Rugged construction with rubberised edges for drop protection.
• Magnetic back for hands-free operation.
• Padded hard case with inserts keeps kit organised.
• Performs in Australian heat, humidity, and dust.

Ease of Use & Efficiency

HydroCycle™ Pump: Returns condensate to the flue automatically, eliminating the need for water trap maintenance.

• Dual-port manometer means fewer tools to carry.
• Bright touchscreen is readable in any light.
• Field-replaceable sensors minimise downtime.

Clear Readings & Consistent Results

• Live trending of O₂, CO, and CO₂ during adjustments.
• Store up to 1000 jobs for traceability.
• Wireless printouts for clients or compliance records.

What's Included

Warranty

1-year warranty on the instrument, 4-year warranty on sensors. Consumables (filters, gaskets, leads, batteries, fuses, sensors, case) excluded.

Related Tools & Accessories

• Other Fieldpiece Combustion Analyzers – Compare CAT85 with other models.
• CATPR Wireless Printer Refills – Keep your jobsite printouts flowing.
• Replacement Hard Case ANC85 – Safe transport and storage.
• Job Link Compatible Tools – Expand your wireless workflow.

Get It Done Right

Upgrade your combustion analysis game with the Fieldpiece CAT85. Faster diagnostics, fewer callbacks, and professional printouts on the spot. Order now and work smarter on every job.