用途：PlantPen系列植物PRI & NDVI计是一款小巧的快速测量植物反射光谱指数的野外便携式仪器，可根据反射系数确定植物特征。通过各种反射系数可以评定叶绿素含量，和其他重要的特征。有两个标准版本光化学反射系数（Photochemical Reflectance Index，PRI）和归一化植被指数（Normalized Difference Vegetation Index，NDVI）。整合了蓝牙技术（蓝牙模块或USB软件狗），FluorPen 1.1软件提供可视化操作和数据传输到PC上。根据用户需要，还可提供定制服务。
两种标准版本：
■PRI 210植物光化学反射系数计：在531nm~570nm波段之间测定叶反射系数。该参数对类胡萝卜素极为敏感，反应植物的光合作用中的光能利用效率和CO2同化速率，并可作为植物水胁迫的可靠指数。因此广泛用于植物产量和胁迫研究。
■NDVI 310植物归一化植被指数计：用来测定NDVI（一种植物体叶绿素重要的指标），在660nm~740nm波长处比较反射光。叶绿素会强烈吸收红光用于光合作用，而叶片细胞结构会强烈反射近红外光。因此，NDVI与光合能力直接相关，从而反映植物冠层的能量吸收状况。
应用领域：
快速测量叶绿素含量
植物光合研究
早期胁迫检测
氮素利用效率研究
功能特点：
携带方便、操作简单。
直接无损测量得到NDVI和PRI值。
内置蓝牙与USB双通讯模块，GPS模块，输出带时间戳的地理位置
软件可导出数据为Excel格式，具备实时控制和遥控功能。
可用于农业、林业以及植物学中光合作用、逆境胁迫等的研究和教学。
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技术参数：
| 测量参数 | PRI（光化学反射指数）=（R531-R570）/（R531 + R570）参考：Sellers等。（1985） NDVI（归一化差异营养指数）=（R740-R660）/（R740 + R660）参考文献：Rouse等。（1974年） |
| 测量光 | PRI 210：内部双波长光源R531 = 531nm，R570 = 570nm NDVI 310：内部双波长光源VIS = 635nm，NIR = 760nm |
| 探测波长范围 | PRI 210： 500-600 nm; NDVI 310：620-750 nm |
| 软件适用系统 | Win7及以上 |
| 样品夹 | 机械式叶夹 |
| Bios | 可升级固件 |
| 存储容量 | 16M |
| 通讯模式 | USB或蓝牙 |
| 内部数据采集 | 100,000个 |
| 显示 | 图形显示 |
| 键盘 | 密封防水设计2键 |
| 自动关机 | 无操作5分钟后 |
| 节电模式 | 自动休眠 |
| 电源 | 可充电锂电池 |
| 充电方式 | USB充电 |
| 电池容量 | 2000 mAh |
| 充电电流 | 0.5 A |
| 电池寿命 | 连续工作70小时 |
| 低电探测 | 显示低电量报警 |
| 尺寸 | 135x 65 x 33 mm |
| 重量 | 188g |
| 工作环境 | 温度0-55℃，湿度0-95%非冷凝环境 |
| 存储环境 | 温度-10~60℃，湿度0-95%非冷凝环境 |
产地：捷克
PlantPen 手持式植被指数测量仪参考文献列表
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