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PAM-2500——PAM-2100的升级版野外光合作用研究的首选仪器Schreiber教授因发明PAM系列调制叶绿素荧光仪而获得首届国际光合作用协会（ISPR）创新奖1983年，WALZ公司首席科学家、德国乌兹堡大学的Ulrich Schreiber教授设计制造了全世界第一台调制荧光仪——PAM-101/102/103，使在自然光下测量叶绿素荧光成为现实，解决了科学界近50年的技术瓶颈。PAM-101/102/103迅速在植物生理、生态、农学、林学、水生生物学等领域得到广泛应用，出版了大量高水平研究文献。但该仪器比较笨重，不易带到野外。1992年，WALZ公司首席科学家、调制荧光仪发明人、德国乌兹堡大学的Ulrich Schreiber教授设计制造了全世界第一台便携式调制荧光仪——PAM-2000，并且在植物生理生态学等科研领域得到广泛应用，此后十几年中成为全球最畅销的调制荧光仪。2003年，WALZ公司在保留PAM-2000所有功能和优点的基础上，结合最新技术，将PAM-2000升级到了PAM-2100。2008年，WALZ公司在保留PAM-2100所有功能和优点的基础上，结合最新的超便携个人电脑（UMPC）技术，将PAM-2100升级到了完全基于UMPC电脑Windows系统的PAM-2500。
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* 声誉卓著的PAM-2100的升级版 * 精巧、准确、迅速、操作简便的高级光合作用检测设备 * 利用强大的UMPC电脑进行操作，完全基于Windows操作系统，界面友好 * 利用超强发光二极管（LED）提供光化光和饱和脉冲，不再使用散热量大的卤素灯 * 强大的数据收集、分析和存贮功能 * 内置锂电池可满足长时间野外工作需要，并可连接外置12 V电池 * 多种叶夹可供选择，专利设计的光适应叶夹2030-B可同时记录PAR和温度变化 * 60 G硬盘，无限量存储功能 * 可测荧光诱导曲线的快速上升动力学O-I-D-P相和O-J-I-P相 * 可测荧光诱导曲线的慢速下降动力学并进行淬灭分析（Fo、Fm、F、Fo’、Fm’、Fv/Fm、Y(II)= ΔF/Fm’、qL、qP、qN、NPQ、Y(NPQ)、Y(NO)、ETR、C/Fo、PAR和叶温等） * 可测光响应曲线和快速光曲线（RLC） * 可在线检测植物、微藻、地衣、苔藓等的光合作用变化 * 操作功能强大，特别适合野外操作，野外操作也使用Windows系统应用领域仪器设计特别适合野外使用，可用于研究光合作用机理、各种环境因子（光、温、营养等）对植物生理状态的影响、植物抗逆性（干旱、冷、热、涝、UV、病毒、污染、重金属等）、植物的长期生态学变化等。在植物生理学、植物生态学、植物病理学、农学、林学、园艺学、水生生物学、环境科学、毒理学、微藻生物技术、极地植物光合作用研究等领域有着广泛应用。主要技术参数* 测量光：红色LED，630 cnm，FWHM 20 nm；调制频率测量Fo时5－5000 Hz可选，打开光化光时1－100 kHz可选，测量荧光诱导动力学的快相时200 kHz；20级可调。* 光化光源： 蓝色光化光：LED，455 nm，FWHM 20 nm，光强范围0－800 μmol m-2 s-1 PAR，20级可调。 红色光化光：LED，630 nm，FWHM 15 nm，光强范围0－5000 μmol m-2 s-1 PAR，20级可调。* 饱和脉冲：红色LED，630 nm，FWHM 15 nm，最大PAR 25 000 μmol m-2 s-1，持续时间0.1－0.8 s可调，光强20级可调。* 远红光：LED，750 nm，FWHM 25 nm，20级可调。* 单周转饱和闪光：红色LED，630 nm，FWHM 15 nm，最大PAR 125 000 μmol m-2 s-1，持续时间5－50 s可调。* 多周转饱和闪光：红色LED，630 nm，FWHM 15 nm，最大PAR 25 000 μmol m-2 s-1，持续时间1－300 ms可调，光强20级可调。* 信号检测：PIN-光电二极管，带长通滤光片（T(50%)=715 nm），带选择性锁相放大器。* 测量参数：Fo、Fm、F、Fo’、Fm’、Fv/Fm、Y(II)= ΔF/Fm’、qL、qP、qN、NPQ、Y(NPQ)、Y(NO)、ETR、C/Fo、PAR和叶温等。* 耗电：基础操作1.6 W，内置光源（测量光、红色和蓝色光化光、远红光）为最大输出时8 W，饱和脉冲最大输出时37 W。* 充电时间：关机状态下约需6 h。 * 微型光量子传感器：测量光合有效辐射（PAR），测量范围0～20000 μmol m-2 s-1 PAR* 热电耦（温度传感器）：Ni-CrNi，直径0.1 mm，测量范围20～＋60℃* 数据通讯：USB；蓝牙v2.0＋EDR Class 2* 操作系统： Windows XP Tablet PC Edition，Windows XP SP2或Vista* 超移动个人电脑（UMPC）参数 型号：三星Q1 Ultra触摸屏UMPC 处理器：Intel A110 800MHz ULV 缓存：512 Kb 内存：1G的DDR II内存 硬盘：60 G，4200 rpm 显示器：7英寸WSVGA触摸屏显示器，1024 x 600像素 图形卡：Intel GMA950，最大128 M共享内存 通讯方式：USB 2.0（两个）；有线LAN；无线LAN（802.11b/g）；蓝牙2.0＋EDR 读卡插槽：SD/MMC 电池：两块锂电池，一块为7.4 V/4 Ah，可工作3.5 h，另一块为7.4 V/7.8 Ah，可工作6 h 供电：100－240 V AC，50－60 Hz部分文献（PAM-2000/PAM-2100/PAM-2500）1. 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