Cảm biến đo lưu lượng nhiệt đất Campbell Scientific HFP01-L

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng

Liên hệ

HFP01-L Soil Heat Flux Plate

THÔNG TIN SẢN PHẨM

Overview

The HFP01, manufactured by Hukseflux, measures soil heat flux, typically for energy-balance or Bowen-ratio flux systems. It outputs a voltage signal that is proportional to the heat flux of the surrounding medium. At least two sensors are required for each site to provide spatial averaging. Sites with heterogeneous media may require additional sensors.

Benefits and Features

Compatible with most Campbell Scientific dataloggers
Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network

Detailed Description

The HFP01 uses a thermopile to measure temperature gradients across its plate. Operating in a completely passive way, it generates a small output voltage that is proportional to this differential temperature. Assuming that the heat flux is steady, that the thermal conductivity of the body is constant, and that the sensor has negligible influence on the thermal flow pattern, the signal of the HFP01 is directly proportional to the local heat flux.

The HFP01’s output is in millivolts. To convert this measured voltage to heat flux, it must be divided by the plate’s calibration constant. A unique calibration constant is supplied with each sensor.

Note: In an energy-balance installation, all sensors must be completely inserted into the soil face before the hole is backfilled.

Specifications

Sensor Type	Thermopile
Sensitivity	50 μV W^-1 m^-2 (nominal)
Nominal Resistance	2 Ω
Temperature Range	-30° to +70°C
Sensor Thermal Resistance	< 6.25 x 10^-3 K m² W^-1
Measurement Range	±2000 W m^-2
Expected Typical Accuracy	Within -15% to +5% in most common soils (12 hour totals)
Plate Diameter	80 mm (3.15 in.)
Plate Thickness	5 mm (0.20 in.)
Weight	200 g (7.05 oz) without cable

Tài liệu

Brochures

HFP01 Heat Flux Sensor

Manuals

Cảm biến đo lưu lượng nhiệt đất Campbell Scientific HFP01-L

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