{"product_id":"castair-gas-engine-hour-meter-hrm50","title":"Castair Gas Engine Hour Meter HRM50","description":"\u003ch2\u003eCastair Gas Engine Hour Meter — HRM50\u003c\/h2\u003e\n\u003cp\u003eThe HRM50 is the hour meter for gas-engine-powered Castair compressors, priced at 85.47. Where the HRM75 and HRM460 connect to AC motor circuits and measure hours based on AC power flow, the HRM50 connects to a gasoline engine's ignition system. It reads the ignition pulses to count engine-running hours — no AC power required, just the ignition signal from the engine's coil or distributor. If you have a Castair gas-powered portable compressor and you want to track engine hours for oil changes, tune-up intervals, and spark plug replacement, the HRM50 is the correct meter.\u003c\/p\u003e\n\n\u003ch3\u003eHRM50 Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition-Based Signal:\u003c\/strong\u003e Connects to the engine's ignition system — counts hours based on ignition pulses rather than AC power, making it compatible with gasoline-engine compressors regardless of engine make or model\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo External Power Required:\u003c\/strong\u003e Draws its operating power from the ignition signal itself — no separate power connection needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-Resettable Counter:\u003c\/strong\u003e Accumulates engine operating hours permanently — accurate lifetime tracking for tune-up intervals and resale documentation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair Factory Specified:\u003c\/strong\u003e Listed in Castair's accessories catalog as the gas engine hour meter for their gas-powered compressor line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Panel-Mount Design:\u003c\/strong\u003e Fits in standard panel cutouts on gas compressor control boxes and enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Track Engine Hours on a Gas Compressor?\u003c\/h2\u003e\n\u003cp\u003eGas engines need more frequent maintenance than electric motors. Engine oil needs changing at 50-100 hour intervals (versus 400-800 hours for compressor pump oil). Spark plugs need inspection and replacement. Air filters get dirtier faster. The carburetor needs periodic cleaning. Without an hour meter, you are either guessing or going by calendar — and on a seasonal or intermittent-use gas compressor, calendar time is a terrible proxy for actual engine wear. The HRM50 gives you an accurate engine hour count to drive all of these intervals correctly.\u003c\/p\u003e\n\n\u003ch2\u003eGas vs. Electric Hour Meters — Key Differences\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHRM50 (Gas) — THIS PRODUCT:\u003c\/strong\u003e Ignition-based signal. For gasoline-engine compressors. Requires connection to ignition coil or distributor. No AC power needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHRM75 (Electric, 24-277V):\u003c\/strong\u003e AC-powered counter. For single-phase electric compressors. Connects to motor circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHRM460 (Electric, 460V):\u003c\/strong\u003e AC-powered counter. For three-phase 460V electric compressors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFactory-Mounted Option\u003c\/h2\u003e\n\u003cp\u003eThe HRM50M is the factory-mounted version — ordered when buying a new Castair gas-powered compressor and installed at the factory. The standalone HRM50 is for retrofitting existing units.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Gas engine hour meter (HRM50)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HRM50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Type:\u003c\/strong\u003e Ignition-based (connects to engine ignition system)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Gasoline-engine-powered air compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounter:\u003c\/strong\u003e Non-resettable hour accumulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Panel mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe have specialized in Castair compressors and accessories since 2016. Gas-engine compressors require more frequent maintenance than electric units, and an accurate hour meter is essential for keeping up with those intervals. The HRM50 is the factory-specified gas engine meter — call us at 866-217-0063 if you need installation guidance or want to confirm compatibility with your specific gas compressor model. Free shipping, full warranty.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342553440469,"sku":"HRM50","price":157.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/HOUR-METER.jpg?v=1772652700","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-gas-engine-hour-meter-hrm50","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}