SI-111-PW Infrared Radiometer for Prewired Enclosures

Name: SI-111-PW - Infrared Radiometer for Prewired Enclosures
Brand: Campbell Scientific

表面温度センサ / SI-111-PW

RETIRED ›
This product is no longer available and has been replaced by: SI-111SS.

SI-111-PW Infrared Radiometer for Prewired Enclosures

利用できるサービス

イメージ
詳細
仕様
互換性
ドキュメント
よくある質問

概要

The SI-111-PW, manufactured by Apogee, is a version of our SI-111 that is fitted with a connector for attachment to a prewired enclosure. This precision infrared radiometer determines the surface temperature of an object without physical contact. The SI-111-PW measures both the subject's surface temperature and the sensor-body temperature. A Campbell Scientific data logger uses these measurements to calculate the correct temperature of the subject.

利点と特徴

Cable connects directly with a prewired enclosure
Compatible with most Campbell Scientific data loggers
Measures surface temperature continuously in the field
Provides road surface, plant canopy, soil surface, snow surface, and water surface temperature measurements
Avoids influencing the temperature, providing more accurate measurements
Ideal for providing spatial averages
Rugged construction—two temperature probes housed in an aluminum body with a germanium window

イメージ

詳細

The SI-111-PW consists of a thermopile, which measures surface temperature, and a thermistor, which measures sensor body temperature. The two temperature sensors are housed in a rugged aluminum body that contains a germanium window.

Both the thermopile and the thermistor output a millivolt signal that most of our data loggers can measure. The data logger uses the Stefan-Boltzman equation to correct for the effect of sensor body temperature on the target temperature. The corrected readings yield an absolute accuracy of ±0.2°C from -10° to +65°C.

Field of View (FOV)

The SI-111-PW has a 22-degree half-angle field of view (FOV). The FOV is reported as the half-angle of the apex of the cone formed by the target (cone base) and the detector (cone apex). The target is a circle from which 98% of the radiation viewed by the detector is being emitted.

仕様

Input Power	2.5 V excitation (for thermistor)
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
Operating Temperature Range	-55° to +80°C
Operating Relative Humidity Range	0 to 100% RH
Cable Description	4.5 m (14.76 ft) twisted, shielded 4-conductor wire with Santoprene casing, ending in pigtails
Absolute Accuracy	±0.2°C (-10° to +65°C) ±0.5°C (-40° to +70°C)
Uniformity	±0.1°C (-10° to +65°C) ±0.3°C (-40° to +70°C)
Repeatability	±0.05°C (-10° to +65°C) ±0.1°C (-40° to +70°C)
Diameter	2.3 cm (0.9 in.)
Length	6 cm (2.4 in.)
Weight	190 g (6.7 oz)

互換性

注意： 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。

Data Loggers

製品	互換性	注意
21X (リタイア)
CR10 (リタイア)
CR1000 (リタイア)
CR10X (リタイア)
CR200X (リタイア)
CR206X (リタイア)
CR211X (リタイア)
CR216X (リタイア)
CR23X (リタイア)
CR295X (リタイア)
CR3000 (リタイア)
CR500 (リタイア)
CR5000 (リタイア)
CR510 (リタイア)
CR800 (リタイア)
CR850 (リタイア)
CR9000 (リタイア)
CR9000X (リタイア)

互換性に関する追加情報

Mounting

The SI-111-PW is often fastened to a CM200-series crossarm, a tripod or tower mast, or a user-supplied pole using a CM230, CM230XL, or CM220 mount. The CM230 and CM230XL are adjustable inclination mounts that allow the SI-111-PW to be mounted perpendicular to the target surface when the target surface is on an incline. The CM230XL is similar to the CM230, but the CM230XL places the SI-111-PW further from the pole or crossarm. The SI-111-PW may also be attached directly to a user-supplied camera tripod.

Connections

The cable on the SI-111-PW is fitted with a connector that attaches to a prewired enclosure.

ドキュメント

カタログ

SI-111-PW Infrared Radiometer

マニュアル

SI-111 and SI-111SS Precision Infrared Radiometers

よくある質問

SI-111-PWに関するよくある質問の数： 7

すべて展開すべて折りたたむ

Does the SI-111 need to be protected from short-wave radiation?
There are two accuracy specifications listed for the SI-111:
- One for when the difference in the target and sensor body temperatures is less than 20°C (more accurate)
- One for when the difference in the target and sensor body temperatures is greater than 20°C (less accurate)
Using a radiation shield with the sensor helps keep the sensor body temperature in close approximation to the ambient air temperature. Ultimately, the need to protect the sensor from short-wave radiation is dependent on what is being measured and under what conditions. For example, Campbell Scientific recommends using a radiation shield for canopy measurements.
How often should the SI-111 be calibrated?

As a general recommendation, recalibration should be done every two years.
What maintenance is required for the SI-111?
The window in the Apogee infrared sensor is inset and protected, but it can become partially blocked in three ways:
1. Spiders can make a nest in the entrance. Campbell Scientific recommends using a cotton swab to apply a spider repellent around the entrance to the aperture. Do not apply the repellent, however, to the sensor window itself.
2. Calcium deposits can accumulate on the window if irrigation water sprays up on the head. These deposits typically leave a thin white film on the surface, which can be removed with a diluted acid, such as vinegar. Calcium deposits cannot be removed with solvents such as alcohol or acetone.
3. In windy environments, dust and dirt can be deposited in the aperture. The aperture can be cleaned with deionized water, rubbing alcohol, or in extreme cases, acetone.
Clean the inner threads and sensor window using a cotton swab dipped in the appropriate solvent. For additional cleaning information, see the Maintenance section of the instruction manual.
What is the maximum cable length that can be ordered for the SI-111, and is there a loss of accuracy with long cable lengths?

The SI-111 has been successfully calibrated with a maximum cable length of 100 m without a loss in accuracy. Ideally, the sensor is calibrated with the overall cable length already configured. Our tests have shown, however, that adding a few meters of cable in the field has a negligible effect on the calibration, provided the measurement device has significantly high input impedance, such as with the CR1000.
What type of surfaces can be measured with the SI-111? Can it be used to measure the surface temperature of water or snow?

The SI-111 can be used to measure a wide variety of surfaces, including water and snow. When measuring objects with low emissivity, however, it is particularly important to apply corrections to the measurement.
センサーにキャリブレーションシートが同梱されている場合、そこにはどのような情報が含まれていますか?

キャリブレーションシートに含まれる情報は、センサごとに異なります。一部のセンサでは、シートにデータロガーをプログラムするために必要な係数が含まれています。その他のセンサでは、キャリブレーションシートは合格/不合格レポートです。
オリジナルの校正シートを紛失した場合、別のコピーをリクエストできますか?
これは、キャリブレーションシートに含まれる情報によって異なります。
- キャリブレーションシートに係数情報が含まれている場合、Campbell Scientific はコピーを保管し、交換コピーを要求することができます。
- キャリブレーションシートに係数が含まれていない場合、Campbell Scientific はコピーを保管しません。製造元に連絡して交換用コピーを入手できる場合があります。

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