{"product_id":"draft-range-differential-pressure-transmitter-eja120a-yokogawa","title":"Draft Range Differential Pressure Transmitter EJA120A Yokogawa","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Yokogawa EJA120A is a high-performance draft range differential pressure transmitter designed for ultra-low pressure measurement in industrial applications such as furnace draft control, cleanrooms, and gas flow monitoring. It utilizes Yokogawa’s proprietary DPharp digital silicon resonant sensor, which delivers high accuracy, long-term stability, and resistance to drift compared to conventional analog sensing technologies. Engineered for demanding environments, the EJA120A ensures precise and reliable pressure measurement from 0.1 to 1 kPa. We supply this unit as 100% brand new, original factory equipment to guarantee optimal performance and long service life.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003ePart Number Breakdown\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEJA120A\u003c\/strong\u003e: Draft range differential pressure transmitter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-D\u003c\/strong\u003e: Output signal (4–20 mA DC with BRAIN or HART communication)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-E\u003c\/strong\u003e: Measurement span (0.1 to 1 kPa draft range)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-S\u003c\/strong\u003e: Wetted parts material (SST316, Hastelloy C-276)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-2\u003c\/strong\u003e: Process connection (1\/4 NPT female)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e-9\u003c\/strong\u003e: Electrical connection (1\/2 NPT female)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0.1 to 1 kPa (0.4 to 4 inH₂O)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.2% of span\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStability\u003c\/td\u003e\n\u003ctd\u003e±0.1% of URL per 60 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e10.5 to 42 V DC (10.5 to 30 V DC for intrinsically safe type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e4–20 mA DC with digital communication (BRAIN\/HART)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85°C \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatic Pressure Limit\u003c\/td\u003e\n\u003ctd\u003e50 kPa (7.25 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-Low Pressure Sensitivity\u003c\/strong\u003e\u003cbr\u003eThe EJA120A is capable of detecting extremely small pressure variations down to 0.1 kPa, making it ideal for precise control of combustion air, ventilation systems, and draft pressure regulation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Overpressure Protection\u003c\/strong\u003e\u003cbr\u003eThe robust DPharp sensor design withstands high static pressures and transient surges, reducing the risk of sensor damage during process upsets or improper valve operations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced RFI\/EMI Immunity\u003c\/strong\u003e\u003cbr\u003eShielded electronics and housing design protect the transmitter from electromagnetic interference generated by nearby motors, drives, and communication equipment, ensuring stable signal output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Field Calibration\u003c\/strong\u003e\u003cbr\u003eZero and span adjustments can be performed via external adjustment screws or handheld communicators using HART\/BRAIN protocols, minimizing the need to open the housing in harsh environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the EJA120A support remote diaphragm seals?\u003c\/strong\u003e\u003cbr\u003eNo, it is primarily designed for direct gas and draft pressure measurement. For corrosive or high-temperature liquid applications, models like the EJA118W with remote seals are more suitable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the transmitter be installed in any orientation?\u003c\/strong\u003e\u003cbr\u003eYes, but orientation may affect the zero point due to fill fluid head. A zero calibration is recommended after installation to ensure accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the DPharp sensor differ from capacitance sensors?\u003c\/strong\u003e\u003cbr\u003eThe DPharp sensor uses a resonating silicon element that produces a frequency output, offering better long-term stability, reduced drift, and improved temperature resistance compared to capacitance-based sensors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the G3 conformal coating option?\u003c\/strong\u003e\u003cbr\u003eThe G3 coating provides enhanced protection against corrosive gases such as hydrogen sulfide, extending the life of internal electronics in harsh chemical or wastewater environments.\u003c\/p\u003e","brand":"YOKOGAWA","offers":[{"title":"Default Title","offer_id":52012547178808,"sku":"EJA120A","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/EJA120A2.jpg?v=1774923435","url":"https:\/\/www.automodulexpert.com\/products\/draft-range-differential-pressure-transmitter-eja120a-yokogawa","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}