The BT-620 is a compact, battery-operated particle counter with six selectable size channels, an integrated printer, and housed in a portable stainless-steel case. The device’s flow rate is 1.0 CFM (28.3 LPM) and is maintained with volumetric flow control for improved accuracy. This benchtop particle counter has a large, easy-to-read display, audible alarms, and an internal printer that work together to verify particulate levels. If the particle count exceeds the user’s pre-set limit, the audible alarm will sound, and the screen display, sample history, and printout will indicate an alarm event. Two programmable count alarm limits may be set.
Ideal for use in cleanrooms, the BT-620 was designed to easily integrate with existing building automation systems, facility software, processors, or may be used as a standalone unit.
CONVENIENT FOR CLEANROOM COMPLIANCE
The BT-620 particle counter is convenient for compliance with 21 CFR Part 11, designed with a password feature to prevent unauthorized changes to the user settings. The unit is also compliant with ISO 14644-1, and ISO 21501-4 with an upgraded calibration.
USER-FRIENDLY
The BT-620 offers intuitive navigation with an ultra user-friendly interface. Each of the six channels may be individually set by the operator from 0.3 to 10 microns without requiring custom calibration. In addition to user-selectable sizes, the instrument features user-adjustable sample time, user-identifiable location IDs, and stores over 8,000 sample events.
Sample history events may be viewed or printed and downloaded to a computer using Met One’s ParticleView or Comet software, or simple ASCII terminal commands. Real-time monitoring is available with an optional software upgrade to ParticleView RT. The unit easily integrates into MODBUS multi-drop networks and facility software. Connectivity is built-in for both digital (Ethernet, USB, RS-232, RS-485) and analog output (0-5 VDC). The BT-620 also includes a memory stick port.
The Printer offers two modes of operation: Print Sample prints sample data at the end of each sample including alarm, date, time and location; Recall Data prints all sample data from first selected date and time to second selected date and time.
A plug-and-play option can immediately add ambient temperature and relative humidity capabilities to displayed and logged data.
The BT-610 is a compact battery-operated particle counter with six selectable size channels and built-in printer all housed in a portable stainless-steel case. Flow rate is 0.1 cfm (2.83 lpm) and is maintained with volumetric flow control for improved accuracy.
AG 树脂经过高度纯化，去除了有机和无机杂质。 由于树脂颗粒度稳定地控制在一个狭小范围内，因此能够提供良好的分辨率和重复性。 AG 树脂可作为强/弱阳离子和阴离子交换剂提供，也可作为混合床离子交换剂提供。 许多树脂提供了多种离子形式，并且可从一种形式转换为另一种形式。 AG 树脂主要用于分离低分子量化合物，例如无机离子、有机酸、核酸或碳水化合物。
AG 1 和 2 树脂是强碱性阴离子交换剂，其季铵官能团连接至苯乙烯二乙烯基苯共聚物晶格。 树脂交联量决定微球的孔径。 交联度较低的树脂具有更加开放的结构，与高度交联的树脂相比，可渗透分子量更高的物质。 它还具有较低的物理抗收缩性和抗溶胀性，因此可吸收更多的水份，并且与同等干直径的高交联树脂相比，会溶胀为更大的湿直径。 下层交联树脂（如 AG 1-X2）用于吸附和分级分离分子量相对较高的物质，如肽、核糖核酸和脱氧核糖核酸以及铀。 上层交联树脂（如 AG 1-X8）用于吸附、交换和分离低分子量的无机阴离子，并用于环核苷酸测定和分级分离有机酸等应用。
