Extech RH300 Hygro-Thermometer Psychrometer

Humidity, Wet bulb, Dew Point, Air Temperature plus External Probe Temperature measurements

The RH300 is a compact meter that is ideal for field applications. Simultaneously displays relative humidity (10% to 90% RH), air temperature and dew point or wet bulb. Calculates T1-T2 differential (air temperature minus external probe temperature) using optional probe (TP890), and T2 minus dew point. Built-in protective sensor cap. Other features include Data Hold, Auto Power Off, and MAX/MIN reading. Complete with 2 AAA batteries.

Extech RH300-CAL

Humidity Calibration Kit

The RH300-CAL is a kit which contains 33% and 75% humidity calibration bottles. Used for verifying calibration of the 445815 humidity meter. Bottles have small opening designed to snuggly fit the remote sensor probe.

Extech RH305

Hygro-Thermometer Psychrometer Kit

The Extech RH305 Hygro Thermometer Psychrometer Kit includes a RH300 humidity meter, external temperature probe, 33% and 75% humidity calibration standards, and batteries. The meter simultaneously displays relative humidity, air temperature, and dew point or wet bulb. It can also measure external temperature using the temperature probe supplied in the kit. The humidity meter itself is compact, making it ideal for field applications. It also has a unique sensor cap which closes to protect meter during storage. Advanced features include data hold, selectable auto power off, and max/min/average reading. The meter can be calibrated in the field using the 33% and 75% humidity bottles supplied in the kit. A hard case is included for storing the calibration bottles when not in use.

Extech RH35

Desktop Hygro-Thermometer Alert

The Extech RH35 monitors humidity, temperature, and dew point from the previous 24 hours. It then alerts users to indoor mold hazard conditions starting with a frown icon warning if humidity reaches 60% RH. If the RH exceeds 65%, a loud audible alarm and bright flashing red LED will be triggered. The frown icon will also appear if the environment is too dry (<40% RH) where static electricity becomes a concern. The RH35 is perfect for commercial, retail and residential sites prone to mold. Complete with stand and 2 AAA batteries.

Extech RH350

Dual Input Hygro-Thermometer Psychrometer

The RH350 displays humidity, dew point, wet bulb, temperature and temperature differential. The triple backlit LCD can be changed to display humidity, temperature, dew point or humidity, temperature and wet bulb or humidity, temperature and Type K thermometer. Can also display the temperature difference between Type K T1 and T2 or air temperature and Type K or Type K and dew point. Advanced features include built-in memory and recall of up to 99 data points, Min/MAX/Average readings from the captured data, data hold and selectable auto power off. Includes 2 Type K temperature probes, and four AAA batteries.

Extech RH350-CAL

Humidity Calibration Kit

The Extech RH350-CAL Humidity Solution Kit is a calibration kit for Extech humidity indicators and is designed for use with Extech RH350 Hygro-thermometer psychrometer. The RH350-CAL includes two bottles-- one at 33% RH and the other at 75%. These bottles are designed to fit snugly around the sensor for accurate calibrations

Extech RH390

Precision Psychrometer

Measure humidity and temperature simultaneously with the RH390 Precision Psychrometer from Extech. A dual-illuminated readout can be alternated to display wet bulb and humidity, or dew point and humidity, or temperature and humidity. This handheld device registers temperatures from -22 degrees to 199 degrees F (-30 degrees to 100 degrees C) and measures the full spectrum of relative humidity with ±2% accuracy between 20 and 90% RH. Complete with carrying case and 9V battery.

Extech RH401

Digital Psychrometer + InfraRed Thermometer

The Extech RH401 is a Digital Psychrometer with a built in IR Thermometer that allows for quick, non contact surface temperature measurements. It displays air temperature, humidity, surface temperature or dew point, and wet bulb, all on a triple LCD with backlighting. The IR thermometer features adjustable emissivity and a spot to distance ratio of 8:1. The meter calculates temperature difference between IR surface temperature and dew point. Other features include data hold, programmable auto power off, and a retractable probe that protects the sensors when the meter is not in use. Includes hard case and four AAA batteries.

Extech RH490 Precision Hygro-Thermometer

Highest 2% RH accuracy with Grains Per Pound (GPP) Display

Anyone whose job relies on calculating humidity levels will appreciate the Extech Hygro-Psychrometer. In addition to measuring relative humidity in 30 seconds, this handheld instrument captures dew point, wet bulb, temperature and water vapor levels (Grams per Kilogram and Grains per Pound). This utility tool will store maximum and minimum readings until the memory is cleared and includes a data-hold button for rapidly fluctuating measurements. Complete with carrying case and 9V battery.

Extech RH520A

Humidity+Temperature Chart Recorder with Detachable Probe

This paperless chart recorder provides simultaneous digital and graphical display of relative humidity and temperature. The display also shows dew point, date and time and Min/Max measurements. Stored readings can be recalled on the display or downloaded to a PC to obtain a permanent record. Provisions for wall mounting or the control panel swivels to act as a desk stand. The user can set audible and visual alarms with High and Low limits for humidity and temperature. ExChart software calculates Wet Bulb and Grains per Pound (GPP). Comes complete with detachable sensor probe with 1 meter cable, RS-232 cable with USB adapter, Windows-compatible software, 100-240 VAC 50/60Hz adapter, and three AA batteries.

Extech RH520A-220

Humidity+Temperature Chart Recorder with Detachable Probe (220V)

The Extech RH520A-220 is a paperless chart recorder that provides simultaneous digital and graphical display of relative humidity and temperature. The display also shows dew point, date and time and min/max measurements. Stored readings can be recalled on the display or downloaded to a PC to obtain a permanent record. Provisions for wall mounting or the control panel swivels to act as a desk stand. The user can set audible and visual alarms with high and low limits for humidity and temperature. ExChart software calculates wet bulb and grains per pound (GPP). Comes complete with detachable sensor probe with 1 meter cable, RS-232 cable with USB adapter, Windows-compatible software, 220 VAC adapter, and three AA batteries.

Extech RH520A-240

Humidity+Temperature Chart Recorder with Detachable Probe (240V)

The Extech RH520A-240 provides simultaneous digital and graphical display of relative humidity and temperature. The display also shows dew point, date and time, and min/max measurements. Stored readings can be recalled on the display or downloaded to a PC to obtain a permanent record. Provisions for wall mounting or the control panel swivels to act as a desk stand. The user can set audible and visual alarms with high and low limits for humidity and temperature. ExChart software calculates Wet Bulb and Grains per Pound (GPP). Comes complete with a detachable sensor probe and 1 m cable, RS-232 cable with USB adapter, Windows-compatible software, 240 VAC adapter, and three AA batteries.

Extech RH520B

Humidity+Temperature Chart Recorder with Detachable Probe

The Extech RH520B is a paperless Chart Recorder that provides simultaneous digital and graphical display of %RH and temperature or dew point, as well as showing date/time and min/max values. Use the free, PC-based software for data transfer to a PC and to graph %RH, temperature, dew point, wet bulb, and g/kg or GPP. Audible and visual high/low alarm limits can be set for humidity and temperature. This recorder is ideal for storage facilities, green houses, laboratories, and other buildings where temperature or humidity may need to be monitored.

Extech RH522

Humidity and Temperature Probe For Extech RH520 Paperless Chart Recorders

The Extech RH522 is a replacement Humidity Temperature Probe for the RH520 Paperless Chart Recorders. It measures -28°C to 60°C (-20°F to 140°F) and 10% to 95% RH. No calibration required. For use with models RH520A, RH520A-220, and RH520A-240.

Extech RH522B

Humidity and Temperature Probe For Extech RH520 Paperless Chart Recorders

The Extech RH522B is a replacement Humidity and Temperature Probe for the RH520B Paperless Chart Recorder. It has a measurement range of -30°C to 60°C (-22°F to 140°F) and 1% RH to 99% RH. No calibration required.

Extech RH550

Humidity/Temperature Chart Recorder with Touch Screen

Simultaneously datalog and monitor relative humidity, temperature, and calculated dew point on the Extech RH550. It features live or user-scheduled recording time and programmable Min/Max alarm set points. A built-in stand is included for desktop use, as well as a bracket for wall-mounting. The RH550 also features a field-replaceable probe that can be attached to the monitor or on a 6.5 ft (2 m) cable. This recorder is useful in office buildings, conference rooms, labs, hospitals, cleanrooms, greenhouses, food storage facilities, and more.

Extech RH550-C

Extension Cable for RH550-P

The Extech RH550-C is a spare/replacement cable for the RH550-P Humidity/Temperature Probe. The cable can extend up to 2 m (6.5 ft) in length. Connect up to three RH550-C cables serially to the RH550 meter without sacrificing accuracy.

Extech RH550-P

Humidity/Temperature Probe for RH550

The Extech RH550-P is a spare/replacement Humidity and Temperature Probe for the RH550. The probe can either be clipped directly onto the tablet (RH550) or attached to a cable (RH550-C) to measure humidity and temperature. Field-replaceable probe does not require recalibration.

Extech RHM15

Mini Hygro-Thermometer Monitor

The RHM15 is a mini hydro-thermometer monitor which measures humidity and temperature and displays it simultaneously. The RHM15 has a built in memory which stores maximum and minimum readings. The RHM15 features a low battery indication and comes with a built in stand, user's manual and LR44 battery. Measures in °F only.

Extech RHM16

Mini Hygro-Thermometer Monitor

The RHM16 is a Mini Hygro-Thermometer ideal for monitoring temperature and humidity conditions in enclosed or open space environments. It helps gauge proper heat and moisture levels while also recording high and low extremes during the day. Measures in °C only.

Extech RHT10

Humidity and Temperature USB Datalogger

The RHT10 datalogs Humidity and Temperature readings (up to 16,000 each) with user programmable sample rates from 2 seconds up to 24 hours for days, weeks and months. USB interface for easy setup and download. Dew Point indication via the included Windows software. User-programmable High/Low alarm thresholds for RH and temperature. Complete with 3.6-Volt Lithium battery, protective USB cap, mounting bracket, and Windows compatible software for analysis.

Extech RHT20 Humidity and Temperature Datalogger

Up to 16,000 readings for RH/Temp & user-programmable sample rate

The RHT20 is a Humidity Temperature Datalogger which records up to 16,000 Humidity and 16,000 Temperature readings with a user programmable sample rate. USB interface for easy setup and data download. Selectable data sampling rates from 1s to 24hr. User-programmable alarm thresholds for RH and Temperature. LCD displays current temperature and humidity readings plus Min/Max and Alarm status. Long battery life. Place or mount the datalogger in monitoring location (storage bin, truck, cargo hold, freezer, temperature-controlled room, etc.). Datalogger records temperature and humidity at sample rate set by user. Connect the datalogger to your PC via the USB interface to retrieve readings. Datalogger displays the current Humidity and Temperature plus Min/Max and alarm status so it can viewed anytime during the recording process. Complete with battery, mounting bracket, and software.

Extech RHT3

EzSmart™ Hygro-Thermometer

The Extech RHT3 is an EzSmart™ Hygro-Thermometer for use with Android or iOS smart devices. The RHT3 comes with a free app from iTunes and Google Play for taking readings. Complete with a built-in sensor and protective connector cap with strap.

Extech RHT30

USB Humidity/Temperature Datalogger

The datalogger is designed with a rugged housing and a standard USB connector where stored readings (up to 48,000 data) are conveniently transferred to a PC in PDF or Excel® spreadsheet format when plugged in. Additional features include an 8-location logger bookmark, 6-language options, programmable sampling interval, adjustable alarm, and password-protected security log-in. Large LCD optimizes viewing and the smart LED provides color-coded humidity, and temperature reading status.