Measure atmospheric pressure changes in both inches of mercury (Hg) and millibars (mbar).

When long life with little maintenance is critical, rely on the same rugged weather equipment used by the National Weather Service. For a complete weather station, you'll need at least one sensor, a sensor cable, and either the Weather Data Center Display or one of the Real-Time Displays.

All mount on vertical 1" pipe (1 3/8" OD). Mounting hardware is included; pipe is not included. Connect to power using screw terminals.

(A) Temperature/Relative Humidity Sensor—Includes a shield that maintains accurate temperature readings by reducing sensor exposure to solar radiation and precipitation. Operates on 10-28 VDC. Output is 4-20 mA.

(B) Barometric Pressure Sensor—Operates on 7-30 VDC. Output is 4-20 mA. Enclosure (sold separately) is required. Optional wind screen reduces variance in measurements caused by wind gusts.

(C) Wind Speed/Wind Direction Sensor—Operates on 8-15 VDC. Output is pulse for wind speed and analog voltage for wind direction. Optional line driver converts the output into 4-20 mA for use with standard PLCs (programmable logic controllers).

(D) Rainfall Intensity Sensor—Does not require a power supply. Output is pulse.

Weather Data Center Display (For Sensors A-D)—Presents live readings from up to eight sensors and logs more than two million readings for later upload to your PC using an RS-232 serial communication cable (sold separately). It can also be programmed to activate alarms on up to four readings. Resolution is 0.1° F for temperature, 1% for relative humidity, 0.01" Hg for barometric pressure, 1 mph for wind speed, 1° for wind direction, and 0.01" for rainfall. Display operates on 10-30 VDC or the included 115 VAC adapter with 6-ft. power cord and two-prong plug. Overall size is 5 11/16" Ht. × 7 7/8" Wd. × 2 1/8" Dp.

Real-Time Displays (For Sensors A and C)—Get accurate, real-time data from either the temperature/relative humidity sensor or wind speed/wind direction sensor. Alarms activate when your chosen thresholds are reached. Resolution is 0.1° F for temperature, 1% for relative humidity, 1 mph for wind speed, and 10° for wind direction. Displays can be linked in parallel to feed multiple displays from a single sensor. They operate on 12-30 VDC or the included 110 VAC adapter with 6-ft. power cord and two-prong plug. Overall size is 5 11/16" Ht. × 5 11/16" Wd. × 1 7/16" Dp.

Monitor nine different weather conditions up to 1,000 feet away. The outdoor weather sensor measures outdoor temperature, humidity, wind speed and direction, rainfall rate, total rainfall, barometric pressure, heat index, wind chill, and dew point. It wirelessly transmits readings to the console by radio signal. Console has built-in sensors to measure indoor temperature and humidity. Console can be placed on a desk or mounted to a wall. It cannot be sold outside the United States due to product registration requirements.

Meters measure indoor relative humidity and indoor and outdoor temperatures. Meter with LCD display also measures outdoor relative humidity.

Meters with calibration certificate come with a document stating they’ve passed a test for accuracy.

Determine relative humidity within ±4% accuracy and temperature within ±1.8° F accuracy. This meter comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. It also displays dew point or frost point.

To ensure reliable readings on the go, this portable meter comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy.

Obtain continuous temperature measurements from a wet-bulb and a dry-bulb thermometer to determine relative humidity. This wall-mount psychrometer consists of two mercury-free fluid-filled thermometers, a wick, a glass water bulb, and a relative humidity calculation table.

For comprehensive system checks and quality control, these meters measure a wider relative humidity range than pocket meters and can determine dew point in addition to humidity and temperature.

The probe is attached to a 3-ft. cable for checking humidity, temperature, and dew point in hard-to-reach areas.

Mount these meters through the wall of a sealed container or package to monitor relative humidity, temperature, and dew points without exposing the contents to dust and water. Check the readings on an easy-to-read LED display. Made of aluminum, the housing is lightweight and resists corrosion.

For technical drawings and 3-D models, click on a part number.

Use smartphones and tablets to monitor humidity and temperature within your system or facility. Connect these battery-powered transmitters to your smart device via Bluetooth, and receive data to ensure workplace conditions are suitable for processes, inventory, or personnel. Good for preventative maintenance and route-based monitoring, these transmitters let you choose how frequently you receive the data, and they’ll notify your device when humidity and temperature levels go outside of your thresholds. Download the app, set your parameters, and collect data from up to 300 ft. away. Rated IP65, they are protected against dust and washdowns.

Turn your transmitter into a portable monitoring system by attaching a quick coupling (not included). This allows fast, temporary connections for on-the-go measurements in different locations.

For technical drawings and 3-D models, click on a part number.

Monitor humidity in sealed containers without opening them, protecting the inside from contamination. These plugs are often used on plastic bags, storage containers, and electrical housings. Consisting of a mounting nut and two gaskets for a tight seal, these plugs install through a hole in a flexible barrier. Remove one gasket and reverse the nut to install plugs in a rigid container. Watch the indicator disc through the nut’s viewing window—it will change color as humidity rises and falls. Made of anodized aluminum, these plugs resist corrosion and are lightweight. They meet military and SAE standards for humidity indicators.

The viewing window on reverse-mounting plugs is on the threaded side, so the nut will be threaded on the outside of your container. They’re easier to install than standard plugs.

For technical drawings and 3-D models, click on a part number.