仪器对比
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Apogee提供两种类型的太阳辐射计，分别为硅光探测器型和新型的热电堆型，均符合ISO9060:2018 Class C级标准（又称二级标准）。硅光探测器型传感器适合预算较低且不需要较高精度的应用，这种传感器的价格低、响应时间快，但在多云天气的误差较大。而新的成本收益型热电堆太阳辐射计具有黑体热电堆检测器，提供更加宽频、更加统一的光谱响应，在各种大气条件下都具有更好的性能表现，用很少的成本便可实现与Class A级热电堆太阳辐射计接近的表现。应用领域包括农业、生态、水文气象网络、太阳总辐射、优化光伏发电系统等短波辐射测量。
硅光探测器型太阳辐射计，经过不断的优化设计，具备准确、稳定、可靠和成本收益特性。
技术特点
符合ISO9060:2018 Class C级标准
具备兼顾的防护外壳，保持清洁干燥
可选加热器，降低降水和低温影响
可选配套的安装连杆
具备多种模拟、数字输出选项
硅光探测器型太阳辐射计参数对比表
SP-212-SS（0-2.5V） | SP-214-SS（4-20mA） | SP-421-SS（SDI-12） | SP-422-SS（Modbus） | |
ISO 9060:2018 | Class C (二级) | Class C (二级) | Class C (二级) | Class C (二级) |
供电 | 5 to 24 V DC | 7 to 24 V DC | 5.5 to 24 V DC | 5.5 to 24 V DC |
牵引电流 | 300 μA | 22 mA maximum; 2 mA quiescent | 1.5 mA (quiescent); 1.9 mA (active) | RS-232 37 mA; RS-485 quiescent 37 mA, active 42 mA |
输出(灵敏度) | 1.25 mV per W m-2 | 0.008 mA per W m-2 | - | - |
输出类型 | 0 to 2.5 V | 4 to 20 mA | SDI-12 | Modbus |
分辨率 | - | - | - | - |
校准系数 | 0.8 W m-2 per mV | 125 W m-2 per mA, 4 mA offset | Custom for each sensor and stored in the firmware | Custom for each sensor and stored in the firmware |
校准不确定性 | ± 5 % | ± 5 % | ± 5 % | ± 5 % |
测量重复性 | Less than 1 % | Less than 1 % | Less than 1 % | Less than 1 % |
长期漂移 | Less than 2 % per year | Less than 2 % per year | Less than 2 % per year | Less than 2 % per year |
非线性 | Less than 1 % up to 2000 W m-2 | Less than 1 % up to 2000 W m-2 | Less than 1 % up to 2000 W m-2 | Less than 1 % up to 2000 W m-2 |
响应时间 | Less than 1 ms | Less than 1 ms | Less than 0.6 s | - |
视场 | 180° | 180° | 180° | 180° |
光谱范围 | 360 to 1120 nm | 360 to 1120 nm | 360 to 1120 nm | 360 to 1120 nm |
方向响应 | ± 5 % at 75° zenith angle | ± 5 % at 75° zenith angle | ± 5 % at 75° zenith angle | ± 5 % at 75° zenith angle |
温度响应 | 0.04 ± 0.04 % per ℃ | 0.04 ± 0.04 % per C | 0.04 ± 0.04 % per C | 0.04 ± 0.04 % per C |
操作环境 | -40 to 70 ℃; 0 to 100 % RH; 浸入水深可达30 m | -40 to 70 C; 0 to 100 % relative humidity; 浸入水深可达30 m | -40 to 70 C; 0 to 100 % relative humidity; 浸入水深可达30 m | -40 to 70 C; 0 to 100 % relative humidity; 浸入水深可达30 m |
规格 | 30.5 mm diameter, 37 mm height | 30.5 mm diameter, 37 mm height | 30.5 mm diameter, 37 mm height | 30.5 mm diameter, 37 mm height |
质量 (含5米线) | 140 g | 140 g | 140 g | 140 g |
独特的热电堆太阳辐射计以低得多价格媲美Class A级传感器，采用黑体热电堆检测器，具备更大的光谱响应范围，在各种环境条件下提供更高准确性。
黑体热电堆太阳辐射计技术特点：
以接近硅光探测器的价格实现接近圆顶型热电堆辐射计的性能
符合ISO 9060:2018 Class C级标准
具备兼顾的防护外壳，保持清洁干燥
可选加热器，降低降水和低温影响
可选配套的安装连杆
输出选项包括0-100 mV或Modbus协议
黑体热电堆太阳辐射计参数对比表
SP-510-SS 向上 | SP-610-SS 向下 | SP-522-SS 向上 | |
ISO 9060:2018 | Class C (二级) | N/A | Class C (二级) |
灵敏度(典型值) | 0.045 mV per W m-2 | 0.035 mV per W m-2 | - |
校准系数 (典型值) | 22 W m-2 per mV | 28.5 W m-2 per mV | - |
输入电压要求 | - | - | 5.5 to 24 V |
校准不确定性 | ± 5 % | ± 5 % | ± 5 % |
输出范围 | 0 to 90 mV | 0 to 70 mV | Modbus |
测量范围 | 0 to 2000 W m-2 (net shortwave irradiance) | 0 to 2000 W m-2 (net shortwave irradiance) | 0 to 2000 W m-2 (net shortwave irradiance) |
测量重复性 | Less than 1 % | Less than 1 % | Less than 1 % |
长期漂移 | Less than 2 % per year | Less than 2 % per year | Less than 2 % per year |
非线性 | Less than 1 % | Less than 1 % | Less than 1 % |
检测器响应时间 | 0.5 s | 0.5 s | - |
视场 | 180° | 150° | 180° |
光谱范围 (50% points) | 385 to 2105 nm | 370 to 2240 nm | 385 to 2105 nm |
方向响应 | Less than 30 W m-2 at 80° solar zenith | Less than 20 W m-2 for angles between 0 to 60° | Less than 30 W m-2 at 80° solar zenith |
温度响应 | Less than 5 % from -15 to 45 C | Less than 5 % from -15 to 45 C | Less than 5 % from -15 to 45 C |
零点偏移A | Less than 2 W m-2; Less than 10 W m-2 (heated) | Less than 1 W m-2; Less than 5 W m-2 (heated) | Less than 5 W m-2; Less than 10 W m-2 (heated) |
零点偏移B | Less than 5 W m-2 | Less than 5 W m-2 | Less than 5 W m-2 |
操作环境 | -50 to 80 C; 0 to 100 % relative humidity | -50 to 80 C; 0 to 100 % relative humidity | -50 to 80 C; 0 to 100 % relative humidity |
加热器 | 780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC | 780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC | 4 mA (heater off); 30 mA (heater on) |
每日不确定性 | Less than 5 % | Less than 5 % | Less than 5 % |
规格 | 23.5 mm diameter, 28.7 mm height | 23.5 mm diameter, 27.5 mm height | 30.5 mm diameter, 37 mm height |
质量 (含5米线) | 90 g | 100 g | 140 g |
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