HMP155A

Name: HMP155A
Brand: Campbell Scientific
SKU: 45187
Availability: InStock

Air Temperature and Relative Humidity Sensor

HMP155A

OrderableConfigurable

Air Temperature and Relative Humidity Sensor

Highest accuracy.

Pricing

Model:: HMP155A
Item Number:: 45187
Warranty:: 1 year
Lead time:: 14 days
Compliance:: requires solar radiation shield for air temp

Overview

Vaisala Temperature/RH Sensor (-80 to +60C) w/o Cable

The HMP155A provides reliable relative humidity (RH) and temperature measurements for a wide range of applications. It uses a HUMICAP^®180R capacitive thin film polymer sensor to measure RH over the 0 to 100% RH range. A PRT measures temperature over the -80° to +60°C range. This rugged, accurate temperature/RH probe is manufactured by Vaisala.

Key Advantages

Accurate, Wide Temp Range
Higher-end sensor where higher accuracy is required

Technical Description

To reduce the current drain, power can be supplied to the HMP155A only during measurement when the sensor is connected to the data logger’s switched 12 V terminal. Data loggers that do not have a switched 12 V terminal, such as the CR510 or CR7, can use the SW12V switched 12 V device to switch power to the sensor only during measurement.

Benefits

Well-suited for long-term, unattended applications
Accurate and rugged
Mounts to a mast, crossarm, or user-supplied pole
Compatible with most Campbell Scientific data loggers

Specifications

Electromagnetic Compatibility: Complies with EMC standard EN61326-1 Electromagnetic
Filter Description: Sintered PTFE
Housing Body Material: PC
Housing Classification: IP66
Voltage Output: 0 to 1 Vdc
Average Current Consumption: ≤ 3 mA
(analog output mode)
Operating Voltage: 7 to 28 Vdc
Settling Time: 2 s
(at power up)
Field-Replaceable Chip or Recalibrate: Recalibrate
Tip Diameter: 1.2 cm
(0.5 in.)
Length: 27.9 cm
(11 in.)
Head Height: 4 cm
(1.6 in.)
Body Height: 2.4 cm
(0.9 in.)
Body Width: 2.0 cm
(0.8 in.)

Relative Humidity

Sensing Element: HUMICAP 180R
Measurement Range: 0 to 100% RH
(non-condensing)
Response Time: The response time for the RH specification is for the HUMICAP 180R at 20°C in still air with sintered PTFE filter and a 0 to 75% RH step change.
Response Time: 20 s
(63% step change)
Response Time: 60 s
(90% step change)
Factory Calibration Uncertainty: The factory calibration uncertainty is defined as ±2 standard deviation limits. Uncertainty is at +20°C. Small variations are possible; see also the calibration certificate.
Factory Calibration Uncertainty: ±0.6% RH
0 to 40% RH
Factory Calibration Uncertainty: ±1.0% RH
40 to 97% RH
Accuracy: -NOTE- Accuracy specifications include non-linearity, hysteresis, and repeatability.
Accuracy: ±1% RH
(at 15° to 25°C, 0 to 90% RH)
Accuracy: ±1.7% RH
(at 15° to 25°C, 90 to 100% RH)
Accuracy: ±(1.4 + 0.032 × reading) % RH
(at -60° to -40°C)
Accuracy: ±(1.2 + 0.012 × reading) % RH
(at -40° to -20°C)
Accuracy: ±(1.0 + 0.008 × reading) % RH
(at -20° to +40°C)
Accuracy: ± (1.2 + 0.012 × reading) % RH
(at 40° to 60°C)