{"product_id":"co-h2-compensated-retrofit-sensor-0554-2104","title":"CO (H2-compensated) Retrofit Sensor","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis Testo H2-compensated CO retrofit sensor (0554 2104) is designed to easily upgrade your compatible flue gas analyser, giving you accurate carbon monoxide readings even in the presence of hydrogen. It's a straight swap to activate H2-compensated CO measurement and automatic dilution in your instrument.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eFor techs working on older gas appliances, industrial burners, or any system where hydrogen might skew your readings, getting true CO values without cross-interference is crucial for safe and compliant operation. I've seen enough dodgy readings from uncompensated sensors to know it's worth getting it right.\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\u003eHVAC service technicians\u003c\/li\u003e\n\u003cli\u003eGas fitters\u003c\/li\u003e\n\u003cli\u003eIndustrial maintenance teams\u003c\/li\u003e\n\u003cli\u003eAnyone needing precise flue gas analysis for compliance and safety\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 sensor is specifically designed for use with:\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eTesto 350 - Portable Emission Analyser (0632 3510)\u003c\/li\u003e\n\u003cli\u003eTesto 350 - Process Kit (400563 3511)\u003c\/li\u003e\n\u003c\/ul\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\u003eH2-Compensated CO Measurement:\u003c\/strong\u003e Delivers accurate carbon monoxide readings even when hydrogen is present, preventing false highs or lows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecalibrated Sensor:\u003c\/strong\u003e Ready to go straight out of the box, saving you time on site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffortless Installation:\u003c\/strong\u003e Designed for simple, DIY insertion into compatible Testo analysers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Dilution Activation:\u003c\/strong\u003e Ensures the analyser's dilution function is active for high CO concentrations.\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\n\u003ctr\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eMeasuring Range (CO with H2-compensation)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e0 to 10000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e1.00 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e18 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eDimensions (LxWxH)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e40 x 30 x 30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eHousing Material\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eProduct Colour\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBlack; Red\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\n\u003cli\u003e1 x CO (H2-compensated) retrofit sensor\u003c\/li\u003e\n\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:\u003c\/strong\u003e Always switch off and disconnect your Testo 350 analyser from power before attempting to open the housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess Sensor Bay:\u003c\/strong\u003e Carefully open the analyser casing according to the manufacturer's instructions to access the sensor compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove Old Sensor (if applicable):\u003c\/strong\u003e If replacing an existing sensor, carefully unclip and remove the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert New Sensor:\u003c\/strong\u003e Align the new 0554 2104 sensor correctly and insert it firmly into its designated slot. It should click or seat securely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClose Casing:\u003c\/strong\u003e Securely close and fasten the analyser casing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Up \u0026amp; Calibrate:\u003c\/strong\u003e Reconnect power, switch on your analyser, and perform a fresh air zeroing\/calibration as per your Testo 350's manual to ensure accurate operation with the new sensor.\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\u003eOnly compatible with the Testo 350 Portable Emission Analyser and Testo 350 Process Kit.\u003c\/li\u003e\n\u003cli\u003eInstallation requires careful handling of the analyser's internal components. If unsure, consult your analyser's manual or a qualified service technician.\u003c\/li\u003e\n\u003cli\u003eAlways ensure your analyser is powered off and disconnected before attempting sensor replacement.\u003c\/li\u003e\n\u003cli\u003eRegular calibration checks are essential, even with precalibrated sensors, to maintain measurement accuracy.\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;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eWhen replacing any analyser sensor, always remember to perform a fresh air zeroing and give the instrument a few minutes to stabilise after powering back on. This ensures your readings are spot on from the first test.\u003c\/p\u003e\n\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 this retrofit sensor with your Testo 350 Flue Gas Analyser and explore our range of Testo accessories and calibration kits to keep your equipment running in top condition.\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\": \"What Testo analysers is this sensor compatible with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This CO (H2-compensated) retrofit sensor is specifically designed for the Testo 350 Portable Emission Analyser (0632 3510) and the Testo 350 Process Kit (400563 3511).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the measuring range for carbon monoxide with this sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The sensor measures CO (H2-compensated) across a range of 0 to 10000 ppm, with a resolution of 1.00 ppm. This ensures precise readings even when hydrogen is present.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the sensor precalibrated or does it need calibration after installation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This retrofit sensor comes precalibrated, allowing for straightforward and effortless insertion into your compatible Testo 350 analyser. However, it's always good practice to perform a fresh air zeroing after installation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Testo","offers":[{"title":"Default Title","offer_id":43782335529019,"sku":"0554 2104","price":4713.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/0393-0104_5cdc43e1-4272-42e3-a95c-7b71655be01e.jpg?v=1783923267","url":"https:\/\/www.hvacshop.com.au\/products\/co-h2-compensated-retrofit-sensor-0554-2104","provider":"HVAC Supply Shop","version":"1.0","type":"link"}