| 型号 | 制造商 | 描述 | 操作 |
| DT2238 [更多] | Lutron Electronics Co Inc | Tachometer Dimensions L x W x H: 215 x 65 x 39 mm Rotational speed range, mechanical: 0.5...19999 rpm Rotational speed range, optical: 5...99999 rpm Speed range: 0.05...1999.9 m/min Weight: 280 g Display: 5 Digits / LCD Electrical supply: 4 x LR6/AA Measuring error, rotational speed, mechanical: ±0.05% Measuring error, rotational speed, optical: ±0.05% Sensor type: optical / mechanical Resolution, rotational speed, mechanical: 0.1 rpm Resolution, rotational speed, optical: 0.1 rpm
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| DT2238/2 [更多] | Lutron Electronics Co Inc | Replacement measuring wheel
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| DT2238/1 [更多] | Lutron Electronics Co Inc | Replacement reflector foil
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| DT2238/3 [更多] | Lutron Electronics Co Inc | Replacement cone
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| DT2238/5 [更多] | Lutron Electronics Co Inc | Plastic shaft for cone
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