Manual

HMP50 Temperature and Relative

Humidity Probe

1. General

The HMP50 Temperature and Relative Humidity probe contains a Platinum

Resistance Temperature detector (PRT) and a Vaisala INTERCAP® capacitive

relative humidity sensor.

The -L option on the model HMP50 Temperature and Relative Humidity probe

(HMP50-L) indicates that the cable length is user specified. Lead length is

specified when the sensor is ordered. Table 1 gives the recommended lead

length. This manual refers to the sensor as the HMP50.

TABLE 1. Recommended Lead Lengths

2 m Height Atop a tripod or tower via a 2 ft crossarm such as the CM202

Mast/Leg CM202 CM6 CM10 CM110 CM115 CM120 UT10 UT20 UT30

9' 11' 11' 14' 14' 19' 24' 14' 24' 37'

Note: Add two feet to the cable length if you are mounting the enclosure on the leg base of a light-weight tripod.

2. Specifications

Operating Temperature: -40°C to +60°C

Storage Temperature: -40°C to +80°C

Probe Length: 7.1 cm (2.8 in.)

Probe Body Diameter: 1.2 cm (0.47 in.)

Filter: 0.2 μm Teflon membrane

Filter Diameter: 1.2 cm (0.47 in.)

Housing Material: chrome-coated aluminum and

chrome-coated ABS plastic

Power Consumption: <2 mA

Supply Voltage: 7 to 28 VDC

Settling Time after power is switched on: 1 second