以下是一份关于3404转速计的产品中英文介绍：

3404转速计是一款由日本日置（HIOKI）公司生产的精密测量仪器。它具有高分辨率0.01rpm和高精度±1dgt，能够有效地进行准确测量。该转速计使用选件9213接触转换器，可变成接触式的转速表，旋转时可以像测量线速度一样应用。其测量模式丰富，包括最大/最小、总和、周期、快/慢采样、模拟输出等多种模式。

在技术参数方面，3404转速计的测量量程为r/min：(30.00～199.99)量程至(20000～99990)量程，4档（慢速采样模式）；r/s：(0.5000～1.9999)量程至(200.0～1600.0)量程，4档（慢速采样模式）。采样周期分为慢速0.5s～2s，快速0.1s～0.5s。探测距离为50mm～200mm，模拟输出为直流1V满量程输出。电源供应可选择R6P（AA）×4（连续使用16小时）或AC电源转换器（6V,300mA）。它的体积小巧，重量轻，尺寸为62宽×180高×38厚mm，重量仅260g，便于携带和操作。

3404转速计的附件包括9211反光贴纸（1），9094输出线（1），携带盒（1）。此外，还有可选附件，如9211反光贴纸（10张、每张10片，每片12×12mm），9213接触式转换器（附9032、9033×2、9212），9212滚轮式接触头，9032金属式接触头，9033橡胶式接触头。

在价格方面，3404转速计的价格因销售渠道和购买数量等因素会有所不同。一般来说，其价格在数千元人民币左右。具体价格可咨询相关经销商，如上海树信仪器仪表有限公司、厦门欣锐仪器仪表有限公司等。

The 3404 tachometer is a precision measuring instrument produced by HIOKI, a Japanese company. It features a high resolution of 0.01rpm and high accuracy of ±1dgt, enabling effective and accurate measurements. With the optional 9213 contact converter, the 3404 tachometer can be transformed into a contact tachometer. When rotating, it can be applied like a linear speed measuring instrument. The 3404 tachometer offers a variety of measurement modes, including maximum/minimum, total, period, fast/slow sampling, and analog output.

In terms of technical specifications, the 3404 tachometer has a measurement range of r/min: (30.00～199.99) to (20000～99990) in four ranges (slow sampling mode); r/s: (0.5000～1.9999) to (200.0～1600.0) in four ranges (slow sampling mode). The sampling cycle is divided into slow 0.5s～2s and fast 0.1s～0.5s. The detection distance is 50mm～200mm, and the analog output is a direct current of 1V full-scale output. The power supply can be chosen between R6P (AA) ×4 (continuous use for 16 hours) or an AC power converter (6V, 300mA). The tachometer is compact and lightweight, with dimensions of 62mm wide × 180mm high × 38mm thick and a weight of only 260g, making it easy to carry and operate.

The accessories of the 3404 tachometer include 9211 reflective tape (1), 9094 output cable (1), and a carrying case (1). In addition, there are optional accessories such as 9211 reflective tape (10 sheets, each with 10 pieces, each piece 12×12mm), 9213 contact converter (with 9032, 9033×2, 9212), 9212 roller contact head, 9032 metal contact head, and 9033 rubber contact head.

Regarding price, the price of the 3404 tachometer varies depending on the sales channel and the quantity purchased. Generally, its price is around several thousand yuan. The specific price can be inquired from relevant dealers, such as Shanghai Shuxin Instrument Co., Ltd and Xiamen Xinrui Instrument Co., Ltd.