Overview
The diving pressure gauge is a critical safety device in scuba equipment, providing real-time monitoring of compressed air remaining in the tank. These gauges typically connect to the regulator's first stage via a high-pressure hose and display readings in bar or psi units. Modern versions often incorporate features like rotating bezels for dive planning and luminous markings for low-light visibility. Professional-grade gauges meet ISO 6425 standards for diving equipment, ensuring reliability at depths up to 50 meters. The device's importance in preventing out-of-air emergencies makes it mandatory for recreational and technical diving operations worldwide.
Structure and Working Principle
Standard diving pressure gauges utilize a Bourdon tube mechanism - a curved metal tube that straightens under pressure, moving a needle across a calibrated dial. The gauge face is protected by a shatterproof lens, usually made from tempered glass or polycarbonate. High-pressure hoses feature reinforced construction with bursting pressures exceeding 300 bar. Internal components are sealed against water intrusion using O-rings and epoxy fills. Some advanced models integrate digital displays with backlighting, though analog versions remain popular for their simplicity and reliability in harsh conditions. The connection port follows standard 7/16" UNF threading for universal regulator compatibility.
Key Features
Diving pressure gauges distinguish themselves through exceptional durability and readability. Top models boast 2.5% accuracy or better across their operating range (typically 0-300 bar). Anti-reflective coatings on dials enhance visibility in bright conditions, while tritium or LED illumination aids night diving. Corrosion resistance is critical - seawater-rated versions use 316L stainless steel or chromed brass housings. Some incorporate swivel joints to prevent hose kinking. For technical diving, gauges may feature dual scales (bar/psi) or redundant displays. Ergonomic designs consider glove operation, with large, textured control surfaces.
Application Areas
Beyond recreational scuba diving, these gauges serve commercial divers, military units, and underwater research teams. They're integral to surface-supplied diving systems, where they monitor both primary and bailout gas supplies. Cave divers often use multiple gauges for different gas mixtures. In industrial contexts, similar pressure gauges (with appropriate certifications) monitor breathing air in firefighting SCBA systems and medical oxygen tanks. Some scientific diving operations utilize gauges with data logging capabilities for research documentation. The aviation industry also employs compatible gauges for high-altitude breathing systems.
Maintenance and Precautions
Regular maintenance includes rinsing with fresh water after saltwater use and inspecting O-rings for wear. Gauges should undergo annual calibration by authorized service centers - noticeable needle stickiness or irregular movements indicate needed servicing. Avoid exposing gauges to temperatures beyond -10°C to +60°C when pressurized. Impact protection is crucial; even minor drops can misalign the Bourdon tube. During storage, keep gauges depressurized to prevent spring fatigue. Some manufacturers recommend replacing high-pressure hoses every 5 years or after visible damage.
B2B Procurement Guide
Bulk purchasers should verify EN250 or equivalent certifications for commercial diving operations. Key specifications to request include measurement range (standard is 0-300 bar), accuracy class (Class 1.6 or better preferred), and depth rating (minimum 50m water resistance). For dive centers, consider bundled packages with regulators to ensure compatibility. Industrial buyers may require ATEX certification for hazardous environments. MOQs typically start at 50 units for custom branding options. Leading manufacturers include Aqualung, Scubapro, and Sherwood, with OEM options available from Taiwanese and Italian specialists.
Related Manufacturers
- 主营：测量点、压力计、波纹管、压力表、温度计、监测泵、绝压表、液位计、保护管、压缩机、剪切梁、控制器、差压表、弯曲梁、传感器、限位器、连接器、热电偶、接线盒、流量计、变送器、液位测量、螺纹接头、测量探杆、哈氏合金
- 主营：德国威卡WIKA仪表、压力传感器、压力开关、压力表、双金属温度计、热电阻温度计、热电偶温度计、温度变送器、德国柯普乐KSR液位仪表、磁翻板液位计、浮球液位开关
- 主营：压力表、wika压力开关
- 主营：BELLMATIC、精和产业喷枪、大洋制器卸扣、MS52压力表、YAMARI热电偶、东京计装流量计、昭和机械、八重崎空压机、HAYASHI泵、日铁溶接工业、清和光学镜头、甲南电机电磁阀、三菱电机、东芝产业机器、住友重机械工业、宣真工业绝缘梯、仲精机制作所、综合计装、KETT白度计、HORIUCHI油封、东芝空压机、仓敷化工、安藤计器、堀场、壶三、气动葫芦
- 主营：压力表、振动测试仪
- 主营：气体检测仪、气体探测器、空气呼吸器、压力表N4101、空气压缩机、充气泵、防毒面具、润滑油、霍尼韦尔呼吸器、梅思安呼吸器、德尔格半面罩、Rd40滤毒罐、德尔格防毒全面罩、空气充填泵、宝华空气压缩机、科尔奇空气压缩机、C900呼吸器、德尔格滤毒盒、JUNIOR II、ICONLSE100、SCBA805M、6738797、6738816、双滤毒盒
- 主营：AMADA天田米亚基、NITTO日东达威、KURITA栗田、压力表、JST日压、ONIKAZE赤松、MORIMITSU、大阪搬运车、东方马达、HOZAN宝三、TRUSCO中山、SSD西西蒂、MAGNESCALE、VESSEL威威、FUSOSEIKI、KASUGA春日电机、IZUMI泉精器、TOHNICHI东日、MASADA正田、S-VANS强光灯、CCS、SIMCO-ION
- 主营：测压软管、高压软管、树脂管、压力表、喷涂管、R7/R8软管、润滑油管、液压油管、液压工具双联管、超高压清洗管
- 主营：拆缸机、阀试验台、拆柱机、支架压力表、单体支柱压力表、矿用流量计、立柱拆装机、锚杆调直机、水力升柱器、风动升柱器、锚索静载试验台、单体支柱试验台、手动升柱器、锚杆拉力计、顶板动态仪、镶套机、锚杆测力计、立柱千斤顶试验台、钻孔应力计、顶板离层仪、紧链器
- 主营：束管接头、粉尘过滤器、束管分路箱、煤矿用聚乙烯束管、矿用电缆挂钩、风动潜水泵、矿用气动锯、浮选机、马弗炉、气动注浆泵、树脂锚固剂、自动苏生器、液压弯管机、司控道岔装置、锤式破碎机、鄂式破碎机、钢筋切断机、除尘风机、管道取样机、皮带取样机、气动风扇、压风供水自救装置、锚索张拉机具、密封制样粉碎机、本安型数字压力计
- 主营：仪表管件、仪表阀门、截止阀、压力表接头、仪表保护温箱、防爆电器、电缆桥架、梯式电缆桥架、槽式电缆桥架、托盘式电缆桥架、铝合金电缆桥架、玻璃钢电缆桥架、热镀锌电缆桥架
- 主营：单体液压支柱、金属顶梁、柱鞋、本安型数字压力表、刮板机配件、皮带机配件、风门
- 主营：检测仪、传感器、流量计、压力表、热电偶、热电阻、水流开关、继电器开关、无纸记录仪、双色玻璃板、氧化锆分析仪、超声波液位计、磁翻板液位计、干簧管控制器、微量氧分析仪、溶解氧测定仪、双金属温度计、高温高压密闭罐、防爆温度变送器、数显压力控制器、磁致伸缩液位计、氧化锆氧分析仪
- 主营：遥控浮球阀、减压阀、泄压阀、压力表、止回阀、调流调压阀、管力阀、多功能水泵控制阀、闸阀、蝶阀、球阀、水力控制阀、排泥阀、过滤器、刀闸阀
- 主营：分析仪、防爆片、真空泵、压力表、隔膜泵、触摸屏、指针表、计数器、转换开关、行程开关、真空吸盘、无水银开关、多功能电表、真空发生器、真空检漏仪、人机界面、电流互感器、氧气分析仪、采样泵、爆破片、消防打印机、罗格朗计时器、MBS变送器、电流表、原装电流互感器、德国电流互感器
- 主营：带压力表支管减压阀、闸阀
- 主营：采煤机用接触器、防爆电磁阀、直流分区开关、隔爆型电磁阀
- 主营：防水密闭门、无压风门、单体液压支柱、矿用本安型数字压力表、油枕木、刮板机配件、双速绞车、隔膜泵、耙斗装岩机、风筒、压风自救装置、圆环链、金属顶梁、电机车、调度绞车、尼龙柱鞋、液力耦合器、托辊、翻斗式矿车、回柱绞车、风门、耙矿绞车、气动葫芦、隔爆水袋、给煤机
- 主营：电磁流量计、旋进旋涡流量计、气体涡轮流量计、压力表、涡街流量计、气体腰轮流量计、涡轮流量计、热式气体质量流量计、超声波流量计、孔板流量计、椭圆齿轮流量计、玻璃转子流量计、金属管浮子流量计、磁翻板液位计、雷达液位计、超声波液位计、压力变送器、双金属温度计、热电阻、热电偶
- 主营：上海仪川、仪川仪表、上海仪表、上海压力表、压力表、防震压力表、超声液位计、双金属温度计、电磁流量计、涡街流量计、LWGY涡街流量计、热电偶热电阻、压力、差压变送器、雷达料位液位计、温控仪、智能电磁流量计、音叉料位计、超声波液位计、液位计、雷达液位计、流量计、燃气涡街流量计、现场UT液位计、压力变送器、阻旋料位计