{"product_id":"testo-co-replacement-sensor-h2-compensation-8000ppm-0390-0109","title":"Testo CO Replacement Sensor with H2 Compensation","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis is the Testo 0390 0109 replacement carbon monoxide (CO) sensor, crucial for keeping your Testo 330-2\/-3 or 327-2 flue gas analyser running spot-on. It helps techs maintain accuracy when checking combustion appliances.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eHaving a spare or knowing when to replace a CO sensor is vital; a faulty one can give misleading readings, putting occupants at risk and leading to call-backs, especially during the busy Australian winter heating season. This sensor includes H2 compensation to prevent common interference.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eBest For\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eFlue gas analysis for residential and commercial heating.\u003c\/li\u003e\n\u003cli\u003eCombustion system commissioning and maintenance.\u003c\/li\u003e\n\u003cli\u003eHVAC service technicians and gasfitters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis Testo CO replacement sensor (0390 0109) is specifically engineered for use with:\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eTesto 330-2 Flue Gas Analyser\u003c\/li\u003e\n\u003cli\u003eTesto 330-3 Flue Gas Analyser\u003c\/li\u003e\n\u003cli\u003eTesto 327-2 Flue Gas Analyser\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThe integrated H2 compensation helps eliminate common cross-interferences from hydrogen, ensuring more reliable CO readings in various combustion environments.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIf you're running a different model, check fittings and specs before ordering.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eFeatures\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Engineered as a genuine Testo part for seamless integration with compatible analysers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eH2 Compensation:\u003c\/strong\u003e Minimises cross-sensitivity to hydrogen, providing more accurate CO measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Measurement Range:\u003c\/strong\u003e Detects carbon monoxide up to 8000 ppm, suitable for a wide array of combustion applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Performance:\u003c\/strong\u003e Ensures your Testo flue gas analyser continues to deliver trustworthy data for safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 16px; margin-bottom: 20px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eMeasurement Parameter\u003c\/th\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMeasurement Parameter\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eCarbon Monoxide (CO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0 to 8000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eCompensation\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eH2 Compensation (Hydrogen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eTesto 330-2, Testo 330-3, Testo 327-2 Flue Gas Analysers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0390 0109\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\u003cli\u003eTesto 0390 0109 CO Replacement Sensor with H2 Compensation, 8000 ppm\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eUsing It on the Job\u003c\/h2\u003e\n\u003col style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Down \u0026amp; Disconnect:\u003c\/strong\u003e Always power off your Testo flue gas analyser and disconnect all probes and hoses before opening the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess Sensor Compartment:\u003c\/strong\u003e Carefully open the analyser casing according to the manufacturer's instructions to access the sensor block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove Old Sensor:\u003c\/strong\u003e Gently unclip or unscrew the old CO sensor. Note its orientation to ensure the new sensor is installed correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall New Sensor:\u003c\/strong\u003e Carefully insert the new Testo 0390 0109 sensor, ensuring it's seated properly and any clips or screws are secured.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassemble \u0026amp; Calibrate:\u003c\/strong\u003e Close the analyser casing, reassemble the unit, and perform a fresh air zeroing and any necessary calibration as per your analyser's manual before use.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eLimitations \u0026amp; Safety Notes\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eThis sensor is specifically for the listed Testo flue gas analysers; it won't work with other models or brands.\u003c\/li\u003e\n\u003cli\u003eAlways handle sensors with care to avoid damage to the sensitive internal components.\u003c\/li\u003e\n\u003cli\u003eRegular calibration and maintenance of your flue gas analyser are crucial for accurate readings and safe operation.\u003c\/li\u003e\n\u003cli\u003eAlways follow your analyser's operating manual for sensor replacement and calibration procedures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTradie Pro Tip\u003c\/h2\u003e\n\u003cblockquote style=\"border-left: 4px solid #007acc; background-color: #f9f9f9; font-style: italic; padding: 15px; margin: 20px 0;\"\u003eDon't wait for your analyser to throw an error code before thinking about sensor replacement. Keep an eye on its response time and stability; if it's getting sluggish or erratic, it's probably time. A pre-emptive swap can save you a frustrating call-out.\u003c\/blockquote\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003ePair With\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003ePair with a Testo Flue Gas Analyser Maintenance Kit to keep your unit in top condition, and explore our range of Testo Analyser Probes for versatile testing options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Automated FAQ Schema --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which Testo analysers is this CO sensor compatible with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This replacement CO sensor, SKU 0390 0109, is compatible with Testo 330-2, Testo 330-3, and Testo 327-2 flue gas analysers. It is designed as a direct replacement part for these specific models.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does H2 compensation mean for CO readings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"H2 compensation means the sensor is designed to minimise interference from hydrogen (H2) in the flue gas. This ensures that the carbon monoxide (CO) readings are more accurate and reliable, especially in combustion environments where hydrogen may be present.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the maximum CO measurement range of this sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Testo 0390 0109 CO replacement sensor has a maximum measurement range of 8000 ppm (parts per million) for carbon monoxide. This range is suitable for a wide variety of residential and light commercial combustion analysis applications.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43785444261947,"sku":"0390 0109","price":1868.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/testo-0390-0109-co-replacement-sensor.jpg?v=1784010773","url":"https:\/\/www.hvacshop.com.au\/products\/testo-co-replacement-sensor-h2-compensation-8000ppm-0390-0109","provider":"HVAC Supply Shop","version":"1.0","type":"link"}