Unverified85% confidenceDecision RuleTime unknown

户外用高度计防水应达10ATM(100米)以上而非仅3ATM，因为强降雨和涉水时气压孔进水会导致读数完全失效；同时需IP68或军标MIL-STD-810G抗震认证以承受跌落

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Unverified户外手表应认准MIL-STD-810G军规认证+5ATM或10ATM防水；5ATM可游泳但不适合浮潜/跳水冲击，涉水运动需10ATM或100米防水79% similar Unverified耐水压标注为2000-5000mm区间，属入门级防水等级，适合普通徒步小雨场景，不适合持续大雨或暴雨户外活动76% similar Unverified防水等级低于IP67的检测笔不建议用于频繁浸入水体测量：多数入门TDS笔仅笔头防水、机身不防水，掉入缸内或机身进水会导致电路损坏，海缸/大缸建议选整机IP67及以上75% similar

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