This product is not available for new orders.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
概览
CWS220A是我们的SI-111红外温度传感器的无线版本。不需要直接接触来测量目标的表面温度。该红外温度探头含有内部的922-MHz的射频电台，将数据传送到CWB100A无线基站或另一个无线传感器。CWS220A内部电台的频段通常用于澳大利亚和以色列，以及其它一些国家。
优势与特点
- 提供道路表面、植物冠层表面、土壤表面、雪表面和水体表面的温度测量
- 内部跳频的射频电台提供了更长的通讯距离和更少的干扰
- 由电池供电
- 可靠的低维护性的低功耗的测量实施方案，可用在接线传感器不适用，或者不期望使用接线传感器的应用中
- 传输可路由经过多达3个别的无线传感器
- 在野外连续测量表面温度
- 适合提供空间平均
- 兼容CR800、CR850、CR1000和CR3000数据采集器
图像
技术说明
CWS220A含有一个热电堆和一个热敏电阻温度探头，热电堆测量目标的表面温度，热敏电阻测量传感器自身的本体温度。两个温度探头都安置在结实的配有锗材质窗口的不锈钢腔体内。CWS220A由电池供电，即可以是碱性电池组，也可以可充电电池加上太阳能板的组合。
CWS220A可以路由自己的传输路径，通过最多另外三个无线传感器。数据采集连接到CWB100A基站，处理和存储数据。CWS220A与PC的连接及配置，是通过A205接口来实现。
通过Stefan-Boltzman方程来决定目标温度的校准系数，在校准的时候就已经存储在CWS220A中。
为什么是无线？
在那些使用有线传感器会产生一些问题的站点，继续使用有线方式会有一些问题。首先，为了保护线缆，需要穿管、挖沟，既费时又费力，有些时候甚至没有可能性。当地的防火规范可能会禁止建筑内部使用某些类型的线缆。在某些应用中，测量需要通过较长距离实现，而较长的线缆可能会降低测量质量，或者成本太高。还有些时候，增加测量的数目非常重要，而数据采集器又没有留有足够的通道用于接入额外的传感器线缆。
| 请注意：内部电台的设计并不是迅速转移数据。当转移数据时，从一个无线传感器开始，通过作为转发器使用的某个传感器，到基站电台结束，每个心跳包需要花15至30秒的时间。如果这个过程中，使用了3个转发器，则需要耗时45至90秒。 |
产品规格
| Weather Resistance | IP67 rating for sensor and battery pack (Battery pack must be properly installed. Each sensor is leak tested.) |
| 操作温度范围 | -25° to +50°C |
| Operating Relative Humidity | 0 to 100% |
| Power Source | 2 AA batteries with a battery life of 1 year assuming sensor samples taken every 10 minutes. (Optional solar charging available.) |
| Average Current Drain | 300 μA (with 15-minute polling) |
| Response Time | < 1 s (to changes in target temperature) |
| Target Temperature Output Signal | 60 μV per °C difference from sensor body |
| Body Temperature Output Signal | 0 to 2500 mV |
| Optics | Germanium lens |
| Wavelength Range | 8 to 14 μm (Corresponds to atmospheric window.) |
| Field of View (FOV) | 22° half angle |
| Absolute Accuracy |
|
| Uniformity |
|
| Repeatability |
|
| Dimensions | 15 x 6 x 4.5 cm (5.9 x 2.4 x 1.77 in.) |
| Weight | 270 g (9.6 oz) |
Internal 25 mW FHSS Radio |
|
| Frequency | 920 to 928 MHz |
| Where Used | Australia and New Zealand |
| FHSS Channel | 50 |
| Transmitter Power Output | 25 mW (+14 dBm) |
| Receiver Sensitivity | -110 dBm (0.1% frame error rate) |
| Standby Typical Current Drain | 3 μA |
| Receive Typical Current Drain | 18 mA (full run) |
| Transmit Typical Current Drain | 45 mA |
| Average Operating Current | 15 μA (with 1-second access time) |
| Quality of Service Management | RSSI |
| Additional Features | GFSK modulation, data interleaving, forward error correction, data scrambling, RSSI reporting |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR5000 (retired) | ||
| CR6 | The CR6 datalogger must have data logger OS version 4.0 or higher. | |
| CR800 (retired) | ||
| CR850 (retired) |
Additional Compatibility Information
Mounting
The CWS220A mounts to a mast or pole via the the 26054 bracket. It is mounted at an appropriate distance from the target where it can measure an individual leaf, a canopy, or any surface of interest. Because the CWS220A is wireless, it can be mounted in many locations that would be problematic for a cabled sensor.
下载
Wireless Sensor Planner v.1.7 (30.5 MB) 08-08-2013
The Wireless Sensor Planner is a tool for use with Campbell Scientific wireless sensors. It assists in designing and configuring wireless sensor networks.