Category: Relative Humidity

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Relative Humidity

Relative Humidity is the measure of the water vapor content in the air. It is expressed as a percentage (%RH) of the amount needed to achieve saturation at the same temperature. This is an indicator of the likelihood that water droplets will form.

CO2 Datalogger for Buildings | CDL 210

CO2 Datalogger for Buildings - Overview

Ensure a healthy, productive indoor environment with this CO2 Datalogger. It provides continuous, real-time monitoring of carbon dioxide levels, temperature, and humidity, helping you optimise ventilation and maintain peak indoor air quality. It features precision tracking using infrared technology to measure CO2 concentrations up to 9,999 ppm. It has a large, clear screen that simultaneously displays CO2 levels, temperature, and humidity. It has customisable acoustic and visual alarms that trigger when preset CO2 limits are exceeded. It has adjustable logging rates and built-in protection to prevent data loss during power failures. It includes the Wöhler indoor climate software for easy data readout and analysis.

CO2 Datalogger for Buildings - Features
- Infrared-CO₂-measurement
- Adjustable acoustical and visual alarm function
- Data logger
- Adjustable comfort level indicator
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Handheld Hygrotemp | RF 220

Handheld Hygrotemp - Overview

This Hygrotemp is a handy, handheld, battery-powered instrument designed for the quick determination of the air humidity in housing spaces and workplaces. It can be applied to control climate systems, to analyse structural damages, to discover potential mould areas and so on. It measures the actual air humidity and temperature and calculates the dew point and the wet bulb by these values.

Handheld Hygrotemp - Features
- Quick test of relative humidity
- Air conditioning test
- Building inspection for mould and other humidity-related problems
- Remote probe
- Min/max /average memory
- Backlight
- Hold function
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Multifunction Pressure and Flow Meter | DC410 Flow

Multifunction Pressure and Flow Meter - Overview

This multifunctional handheld instrument is used to measure differential pressure, airflow, air speed and temperature, as well as for the registration of humidity and barometric pressure. It is suitable for use for acceptance measurements at ventilation systems according to DIN EN 12599; 4 PA Pressure Test to confirm the combustion air availability; measurement of the ventilation loss and the surface loss; flow pressure, installation pressure, standing pressure, jet pressure; flow measurement in air and flue gas ducts; and a data logger. It is highly accurate and incorporates "no-drift" technology. It is tested to comply with standards for ventilation for buildings. It has a USB interface to communicate with your PC, or can print directly with the Wöhler TD 600 thermal fast printer. It can be operated with one hand and has a 4-button keypad.

Multifunction Pressure and Flow Meter - Features
- Multi-functional
- Highly accurate
- Technician friendly
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Multifunction Temperature and Humidity Transmitter | THS30X
Price range: R5,101.00 through R6,335.00 ex vat
Multifunction Temperature and Humidity Transmitter - Overview

Capacitive Humidity Sensor & Pt 100 A class Temperature Sensor. Available as Wall, Remote, Outdoor and Duct type. This industrial sensor comes with high accuracy and long-term stability and is capable of temperature compensation and linear calibration. With 2 analogue outputs or Modbus RS-485 and an optional analogue output + RS-485. Includes free programmable software for Physical quantities / Output / Data logger / Charts / Calibration.

Multifunction Temperature and Humidity Transmitter - Features
- Measuring range between -40 ... +80°C / 0 ... 100%RH
- Output : 4 ... 20 mA / 0 ... 10 V / RS-485
- Accuracy: ±0.2°C / ±1.8%RH
- IP rating of IP65.
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Digital Analogue Temperature and Humidity Transmitter | THS17
Price range: R2,136.00 through R2,681.00 ex vat
Digital Analogue Temperature and Humidity Transmitter - Overview

This compact Temperature and Humidity Transmitter is easy to install and boasts economic pricing, high accuracy and long-term stability. It comes in PC fire-proof class plastic and SUS304 metal housing. Suitable for monitoring of HVAC process, air conditioning, environmental ventilation control, buildings, factories, clean rooms and laboratories.

Digital Analogue Temperature and Humidity Transmitter - Features
- Real-time data of temperature & humidity
- PC fire-proof class plastic and SUS304 metal housing
- Economic price, high accuracy, nicer long-term stability
- MEMS semiconductor sensor
- Anti-condensation protection
- Digital: RS-485 ; Analog: 4 ... 20 mA or 0 ... 10 V
- Compact size and elegant outlook and easy to install
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LAN Interface Data Logger | RMS-LOG-L
R10,079.00 ex vat
LAN Interface Data Logger - Overview

This data logger is the component between the humidity/temperature probe and the database in the Rotronic Monitoring System (RMS). It stores 44,000 pairs of measured values from the exchangeable HygroClip probe and transmits them to the RMS database via LAN. It is suitable for absolute data protection, even if the power supply and communications should temporarily break down.

LAN Interface Data Logger - Features
- Compatible with RMS Gateway, RMS server software and RMS Cloud
- Conforms to FDA 21 CFR Part 11 / GAMP5
- Stores 44,000 pairs of measured values
- Fail-safe, internal battery
- 3 yrs battery lifetime
- LAN Interface
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Indoor External Temp Thermometer Hygrometer | HTC-2
R195.00 ex vat
Indoor External Temp Thermometer Hygrometer - Overview

This indoor wall mount or flip stand Hygrometer displays indoor and outdoor temperature, humidity and clock. Comes with a 1.5m cable.

Indoor External Temp Thermometer Hygrometer - Features
- Internal Temperature -10 ~ +50ºC
- Internal Humidity 10 ~ 99% RH
- External Temperature -50 ~ +70ºC
- Accuracy Temp. ±1ºC
- Accuracy Humidity ±5% RH
- Resolution 0.1ºC / 1% RH
- Min / Max Memory
- Clock (12/24 hr)
- Cable Length 1.5m
- Battery Powered 1 x AAA 1.5V Alkaline Battery
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Rotronic Humidity and Temperature Calibration Ampoules | EAXX-SCS
Price range: R1,801.00 through R6,130.00 ex vat
Rotronic Humidity and Temperature Calibration Ampoules - Overview

Being equipped with the correct devices and software makes calibrating and adjusting probes on-site at your premises easy. Rotronic calibration devices are small, airtight chambers that fit any 5/12/15/25 mm probes (Rotronic standard 15/25mm). The lower part of the device consists of a screw-on lid. The humidity standard is poured onto an absorbent textile pad into the screw-on lid. The specified humidity is generated in the calibration device after a stabilisation period. High humidity values require a longer stabilisation period. The probe can then be calibrated or adjusted by comparison with the reference value of the humidity standard.

Rotronic Humidity and Temperature Calibration Ampoules - Features
- Simple and safe use
- Traceable to national standard
- Inexpensive calibration on-site
- Unlimited lifetime as long as the glass ampoules are kept sealed
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Digital Thermo-hygrometer | PH1000
R295.00 ex vat
Digital Thermo-hygrometer- Overview

The Thermo-Hygrometer model PH1000 features a large, easy-to-read dual display. With a humidity range of 10 to 99 rH and a temperature range from -50 to +70°C at a resolution of 0.1°C. It also incorporates a 12/24 hour clock. The instrument is housed in a white ABS case which had a foldaway stand and keyhole slot for wall hanging.

Digital Thermo-hygrometer - Features
- Temperature Range -50 to + 70°C
- Humidity Range: 10 – 99 rH
- Accuracy: Temp: +/- 1ºC (2ºF) Humidity: +/- 5% RH
- Display resolution: Temp: 0.1ºC (0.1ºF) Humidity: 1%RH
- Max Min Memory
- Foldaway stand and keyhole slot for wall
- 0.1°C/°F resolution
- Powered 1x 1.5V AAA
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Indoor Thermometer-Hygrometer Clock | 288-CTH
R275.00 ex vat
Indoor Thermometer-Hygrometer Clock - Overview

This indoor digital wall-mount / desktop thermo-hygrometer displays temperature, comfort index, humidity and clock. It uses a AAA Alkaline battery (included)

Indoor Thermometer-Hygrometer Clock - Features
- Indoor Temperature Range: -50~+70°C
- Temperature Accuracy: ±1.0℃（1.8℉）
- Temperature Resolution: 0.1℃（0.1℉）
- Indoor Relative Humidity Range: 10~99%
- RH accuracy: ±5% (35~75%)
- Minimum and Maximum memory with reset
- Comfort index icon
- Desktop stand or wall hanging
- 1 x AAA alkaline battery included
- Size: 150 x 97 x 21mm (LCD 67 x 85mm)
- Comfort Index Display: COMFORT, WET, DRY
- Simultaneous Indication: Temperature, Humidity, CLOCK
- Temperature Indication: ℃／℉
- Max. /Min.Temperature and humidity data store function
- Calendar function, HOUR BEEP function, alarm clock, and 12/24 hour display
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Whirling Hygrometer with Case | T102
R550.00 ex vat
Whirling Hygrometer with Case - Overview

The Whirling Hygrometer, also known as a Sling Psychrometer, is used for measuring relative humidity. It is made from two thermometers mounted on a frame which rotates around a handle and is whirled in the air by hand. One thermometer is covered with a tight-fitting muslin sock which is kept wet by (preferably) distilled water. This type of thermometer is known as the wet-bulb thermometer. The other is the dry-bulb thermometer and exposed to the atmosphere directly. Where the air is less than 100 per cent relative humidity, the wet bulb will display a lower temperature than the dry bulb known as wet-bulb depression. A special chart is used to convert the wet-bulb depression to relative humidity, or the relative humidity can be determined by correlating the readings with those on a simple slide rule, which is supplied with each instrument.

Whirling Hygrometer with Case - Features
- Carry case
- Slide rule
- No mercury
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CO₂, Temperature and Humidity Transmitter | THG03
R4,152.00 ex vat
CO₂, Temp. & Humidity Transmitter - Overview

This 3-in-1 device measures and transmits carbon dioxide, temperature, and humidity readings. For indoor use. Quick and easy to install, with the added benefit of low maintenance.

CO2, Temp. & Humidity Transmitter - Features
- 3 sensors in 1 device with LCD display
- Measures temperature, carbon dioxide & humidity
- 2 analogue outputs and Modbus RS-485
- Optional analogue output + RS-485
- Cost-efficient and reliable
- Data can be logged and transferred to PC via RS-485 function
- Quick easy installation and maintenance
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CO2 Display | Rotronic
R18,280.00 ex vat
CO2 Display - Overview

This CO2 display simultaneously measures and records CO2, humidity and temperature. It can be wall-mounted or put on a bench-top. Configurable directly via buttons. Stored data can be exported to a USB memory stick for analysis with the free ROTRONIC software package SW21. This instrument offers unbeatable value for money. It comes equipped with the stable ROTRONIC HYGROMER® IN-1 humidity sensor. Suitable for Indoor Air Quality, Open-Plan Offices, Classrooms, Meeting Rooms, Shopping Centers, and Fitness Studios.

CO2 Display- Features
- Adjustable, visual CO₂ indicator
- Measures and records CO₂, relative humidity and temperature
- Accuracy ±2.5 %RH / ±0.3 K / ±30 ppm + 5% of measured value
- Humidity sensor HYGROMER® IN-1
- 18,000 data point memory for CO₂, humidity and temperature values
- Display of date and time
- Large, easy-to-read display
- USB access for data download
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Wireless Mini Data Logger | RMS-MLOG
Price range: R5,021.00 through R7,008.00 ex vat
Wireless Mini Data Logger - Overview

The mini data logger is a low-cost wireless data logger used with the ROTRONIC Monitoring System (RMS). Its small housing and wireless interface make it really flexible. Extremely versatile, it can be used in a broad spectrum of applications such as refrigerators, incubators, door contacts and OEM analogue devices.

Wireless Data logger variants:
- Temperature & Humidity
- Temperature sensor (NTC)
- External temperature sensor (NTC)
- Light
- Voltage measurement,
- Current measurement 0-20mA
- Digital switch contact
Extremely versatile, it can be used in a broad spectrum of applications such as refrigerators, incubators, door contacts and OEM analogue devices.

Wireless Mini Data Logger - Features
- Conforms to FDA 21 CFR Part 11 / GAMP5
- Stores 10,000 measured values
- Syncs with remote database when connected
- The internal battery is a Fail-safe
- Battery lifetime 3 years
- Depending on the version, it measures temperature, current, voltage, or light, or monitors a digital switch input
- Compatible to FDA 21 CFR Part 11 / GAMP5
Requires an RMS Gateway connected to Internet, together with software RMS server software or RMS Cloud

https://www.youtube.com/watch?v=W4aYACPFifA

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Accurate Humidity Sensor Probe | HC2A-S
Price range: R9,950.00 through R27,048.00 ex vat
Accurate Humidity Sensor Probe - Overview

This humidity sensor, HC2A-S / HC2A-S3 is the most versatile probe from ROTRONIC and forms the basis of the product portfolio. It measures humidity and temperature and calculates the dew/frost point. Used in HVAC, food, building services equipment, paper, textile and pharmaceutical industries.

Accurate Humidity Sensor Probe - Features
- 100% field interchangeable
- Calibrate sensor without having to disconnect the transmitter
- Relative humidity, temperature measurement and dew point calculation
- Excellent long-term stability <1 %RH / year
- Humidity sensor accuracy from ±0.5 %RH
- Integrated data acquisition and calibration history
- Auto-diagnostics with error compensation
- Programmable alarm functions
- Advanced easy-to-use calibration features
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