Tracks smaller PSI changes-- 8” easy-to-read chart shows 3X as much data as 4” modelsRugged low-maintenance design features--• Metal Case• Single AA battery power• 7 day or 24 hour operation• Keyhole slot for wall mount• Triple-strength data resolution(Order Charts Separately) ☆型號：PR8200PB7S ☆類型：圓盤式壓力記錄儀
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