{"product_id":"55102-2400","title":"Mastercool 55102-2400 R744 CO₂ High Pressure Replacement Gauge 70mm Oil Filled","description":"\u003ch1\u003eMastercool 55102-2400 — R744 CO2 High Pressure Gauge 70mm Oil Filled\u003c\/h1\u003e\u003cp\u003eProfessional 70mm oil-filled high pressure gauge specifically designed for R744 (CO2) refrigeration systems. Dual scale display shows both psi and MPa measurements for accurate pressure monitoring in transcritical CO2 applications. Oil-filled design dampens needle vibration and protects internal components from harsh operating conditions typical of high-pressure CO2 systems.\u003c\/p\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR744 CO2 Specific\u003c\/strong\u003e – Designed for transcritical CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e70mm Gauge Face\u003c\/strong\u003e – Large, easy-to-read dial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil-Filled Design\u003c\/strong\u003e – Dampens vibration, protects internals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Scale\u003c\/strong\u003e – psi and MPa measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure\u003c\/strong\u003e – Optimised for HP side monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Grade\u003c\/strong\u003e – Built to Mastercool standards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e – Withstands extreme CO2 system pressures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: 55102-2400\u003c\/li\u003e\n\u003cli\u003eType: High pressure gauge\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R744 (CO2)\u003c\/li\u003e\n\u003cli\u003eGauge Size: 70mm diameter\u003c\/li\u003e\n\u003cli\u003eFill: Oil-filled\u003c\/li\u003e\n\u003cli\u003eScale: psi and MPa\u003c\/li\u003e\n\u003cli\u003eApplication: CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eConnection: 1\/4\" SAE (standard)\u003c\/li\u003e\n\u003cli\u003eSKU: 55102-2400\u003c\/li\u003e\n\u003cli\u003eBarcode: 700376116854\u003c\/li\u003e\n\u003cli\u003eHS Code: 90262080\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eR744 (CO2) High Pressure Applications:\u003c\/h2\u003e\u003cp\u003eR744 (carbon dioxide) systems operate at significantly higher pressures than traditional refrigerants, particularly on the high-pressure side where transcritical operation can exceed 1,400 psi (10 MPa). This high pressure gauge is specifically calibrated for the HP side of CO2 systems, providing accurate readings across the full operating range of transcritical CO2 refrigeration.\u003c\/p\u003e\u003ch2\u003eOil-Filled Gauge Benefits:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Dampening\u003c\/strong\u003e – Oil fill reduces needle flutter for accurate readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Protection\u003c\/strong\u003e – Protects internal mechanism from shock and vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Life\u003c\/strong\u003e – Reduces wear on internal components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarsh Environment\u003c\/strong\u003e – Withstands demanding commercial refrigeration conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure Stability\u003c\/strong\u003e – Maintains accuracy under extreme CO2 pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Performance\u003c\/strong\u003e – Maintains accuracy over time\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCommercial CO2 refrigeration systems\u003c\/li\u003e\n\u003cli\u003eTranscritical CO2 installations\u003c\/li\u003e\n\u003cli\u003eSupermarket refrigeration\u003c\/li\u003e\n\u003cli\u003eCold storage facilities\u003c\/li\u003e\n\u003cli\u003eCO2 cascade systems\u003c\/li\u003e\n\u003cli\u003eNatural refrigerant applications\u003c\/li\u003e\n\u003cli\u003eCO2 system commissioning and service\u003c\/li\u003e\n\u003cli\u003eHigh-pressure side monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eComplete R744 CO2 Gauge Set:\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-1400-r744-co2-low-pressure-gauge-70mm-oil-filled\"\u003e55102-1400 — R744 CO2 Low Pressure Gauge 70mm\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eR744 CO2 Manifolds:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55103-a-r744-co2-2-valve-piston-manifold-cl-1-1-4-sae\"\u003e55103-A — R744 CO2 2-Valve Piston Manifold 1\/4\" SAE\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55661-a-r744-co2-2-v-piston-manifold-cl-1-1-4-3-150\"\u003e55661-A — R744 CO2 2-Valve Piston Manifold 3-150\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mastercool-55102-a-r744-co2-2-valve-piston-manifold-body-only-1-4-sae\"\u003e55102-A — R744 CO2 2-Valve Piston Manifold Body Only\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Use CO2-Specific High Pressure Gauges?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect Pressure Range\u003c\/strong\u003e – Calibrated for extreme CO2 operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Readings\u003c\/strong\u003e – Proper scale divisions for transcritical CO2 systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e – Designed to handle high CO2 pressures safely (up to 1,400+ psi)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Standards\u003c\/strong\u003e – Meet requirements for CO2 refrigeration service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Units\u003c\/strong\u003e – psi and MPa for international applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTranscritical Operation\u003c\/strong\u003e – Essential for monitoring supercritical CO2 conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTranscritical CO2 Systems:\u003c\/h2\u003e\u003cp\u003eIn transcritical CO2 operation, the high-pressure side operates above the critical point of CO2 (1,070 psi \/ 7.38 MPa at 31°C). This requires specialised high-pressure gauges capable of accurately measuring pressures well above traditional refrigerant systems. The 55102-2400 is specifically designed for these demanding applications.\u003c\/p\u003e\u003ch2\u003eInstallation:\u003c\/h2\u003e\u003cp\u003eConnect gauge to high pressure port on CO2 manifold using 1\/4\" SAE connection. Ensure connection is secure and leak-free – CO2 systems operate at very high pressures. The oil-filled design means the gauge should be mounted in an upright position for optimal performance. Avoid over-tightening connections which may damage threads.\u003c\/p\u003e\u003ch2\u003eMaintenance:\u003c\/h2\u003e\u003cp\u003eInspect gauge regularly for damage or leaks. Check that needle returns to zero when not under pressure. If gauge becomes damaged or shows signs of oil leakage, replace immediately. Store in protective case when not in use to prevent damage to gauge face and connection threads. Never exceed the maximum pressure rating of the gauge.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eProfessional R744 CO2 high pressure gauge\u003c\/strong\u003e with 70mm oil-filled design. Dual psi\/MPa scale for transcritical CO2 refrigeration systems. Built for extreme pressure commercial refrigeration service.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164099584377,"sku":"55102-2400","price":70.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/55102-2400.png?v=1777442804","url":"https:\/\/www.airconspares.com\/products\/55102-2400","provider":"Airconspares.com","version":"1.0","type":"link"}