土壤測量
品名：單點式土壤溫濕度偵測器
Model：CASM-201
．溫度範圍：-20°C~70°C(僅限數位輸出款型)
．輸出：0~5mA、4-20mA、SDI12、RS485(擇一)
．垂直安裝時，傳感器會測量出6英寸（15厘米）的土壤層上的平均體積水分含量。 當水平安裝時，該傳感器可用於測量特定土壤深度的水分。
．低電耗
| CASM-201 |
| 測量範圍 |
濕度：0~100% of VMC
溫度：-20~70℃(僅限數位輸出款型) |
| 精度 |
濕度：±2.0%*
溫度：±0.5℃
|
| 輸出訊號 |
類比：0-5 mA, 4-20 mA
數位：SDI-12, RS-485 |
| 接線 |
裸線（可選 4 pin，IP66/IP68
級環境連接器） |
| 熱機時間 |
類比：< 100 ms
數位：< 1 sec |
| 輸入電壓 |
6 to 14 VDC max. 18 VDC |
| 當前消耗 |
0-5 mA: 18 mA (nominal),
25mA (max)
4-20 mA: 30mA (nominal), 50 mA (max)
Digital: < 0.1 mA (quiescent), 15-35 mA (active |
| 操作溫度 |
-20°C to
+70°C |
| 儲存溫度 |
-40°C to 85°C |
| 尺寸 |
19.6 x 2 x 0.56cm |
| 重量 |
38 g per m |
| 標準電纜 |
5m |
|
|
| * 8% to 42%
VMC, in controlled laboratory conditions; factory calibrated for most
agricultural soils. In field applications, accuracy may slightly decrease due
to the inevitable heterogeneity of soil texture, soil compaction, moisture
and fluctuation in soil temperature. The accuracy may also decrease in
di¢cult soil conditions (higher clay and salinity content). In normal
conditions, GroPoint sensors will maintain their accuracy from permanent
wilting through field capacity in sandy loam through clay soils with less
than 60% clay particles. Under moderately saline conditions. GroPoint sensors
will maintain their accuracy up to 6 ds/m. |
|
