What Is a Humidity Test Chamber
You've probably seen this happen before: a product ships fine from a dry warehouse, then lands somewhere humid — a coastal port, a monsoon season, a poorly ventilated storage container — and suddenly components are corroding, packaging is swelling, and returns start piling up. And by the time that data reaches your desk, the batch is already out the door. A humidity test chamber is what catches that failure mode before it ever leaves the lab.
A humidity test chamber gives uniform temperature and humidity with precise, controlled accuracy for cost-effective testing. These chambers are built for humidity-sensitive products — food, cell phones, automobile sensors, pharmaceuticals, and chemicals — where even a small swing in relative humidity can change how a product performs or degrades. Yatherm conditioning test chambers are built with high-quality, compact design and superior performance, and they're a natural fit for research and development work where accurate, repeatable results actually matter.
We offer benchtop humidity and temperature test chambers in 50, 70, 100 and 150 litre sizes with an inbuilt humidity generation tank, plus a highly advanced, maintenance-free imported electronic humidity sensor for accurate readings. Our conditioning test chambers run between -70°C and 150°C with relative humidity from 20% to 95%. Construction is stainless steel interior with powder-coated GI sheet exteriors, PID control for temperature and a dedicated humidity controller, and your choice of PLC with HMI in 7-inch, 5-inch or 4-inch display. Every chamber is built to international standards for use across private and public sector labs in India, backed by a two-year warranty.
Where a Temperature Humidity Test Chamber Actually Gets Used
Yatherm manufactures temperature and humidity test chambers in customized, tailor-made sizes with low and high humidity ranges to match your protocol, using inbuilt heaters and water tanks instead of external water sources for more precise, controlled humidity. Industries relying on this testing include:
- Aerospace
- Automotive
- Home appliances
- Scientific research departments
- Electronics
- Defense
- Food industry
- Drug industry
- Pharmaceuticals
What's Built Into Every Chamber
Special features across our range include a temperature range of -60°C to 180°C, humidity range of 25% to 95% RH, a capacitive humidity sensor with vapor humidification, a password-protected touchscreen, and an SS 304 inner chamber. You get real-time data logging over USB, tight door sealing with a gasket, corrosion-free glass, SS racks with a validation port, and Ethernet computer interface. The door itself is hinged for easy access and comes with door heating to prevent condensation buildup at the seal. Heating runs through sheathed electric heaters for safety and reliability, and every chamber carries ISO, UL and CE approval, hermetically sealed compressors, and a Class 3.1 independent temperature safety device (DIN 12880) with both visual and audible temperature alarms.
Depending on your protocol, we configure chambers for high humidity with high temperature, low humidity with low temperature, uniform temperature with variable humidity, or uniform humidity with variable temperature — because a lot of real-world failure modes only show up under one specific combination, not the "standard" test everyone defaults to.
Controller and Build Quality
The programmable controller runs on a 7-inch colored touch panel HMI with PLC, handling data logging, ramp-up time, soaking time, jump programming, and auto-start/end functions. An RS-232 interface connects to a computer for output, alongside real-time graphing and telephonic monitoring and control — useful if your lab needs to check on a long run without physically walking over to the unit.
Construction-wise, the interior chamber is complete SS 304, with the exterior available in MS powder-coated or rust-free SS 304 for long service life. Shelves are heavy-duty, rugged steel wire and adjustable for easy maintenance. The outer door comes with a glass window, lockable handle, glass wool insulation, silicone gasket, and a heating tube for moisture removal at the seal. All benchtop models sit on four caster wheels, two of which lock, for easy repositioning around the lab.
Heating, Humidity and Air Circulation Systems
Heating runs through ISI-marked U-shaped fin-type air heaters for uniform distribution inside the chamber, paired with a circulation fan — an air heater without a fan simply can't heat evenly, so the two work as a matched pair. Humidity comes from an inbuilt stainless steel water tank with a water heater built to international standards for proper moisture generation, backed by a quality low-water cut-off so a missed refill doesn't damage the heater. Air circulation runs on a 1/8 HP motor with an impeller to keep temperature and humidity even throughout the chamber.
Computer interface options include RS-232/RS-485 for connectivity and data storage, plus a USB port for straightforward data transfer. On safety, every humidity test chamber comes with a circuit breaker, over-temperature protection, a door-opening alarm, and both high- and low-temperature alarms.
Benchtop, Floor-Mounted or Walk-In — Sized to Your Lab
Whether you need a compact benchtop unit for component-level testing or a full walk-in chamber for bulk product runs, Yatherm builds across that entire range. Our TESTO series covers benchtop and floor-mounted models from 150 to 500 litres, and walk-in models scaling up to 10,000 litres for larger batch or assembly testing. If your lab is also running long-duration drug or material shelf-life studies alongside humidity conditioning, it's worth looking at our stability test chamber range too, since a lot of pharma and electronics labs end up running both side by side.
Frequently Asked Questions
1. What's the temperature and humidity range of Yatherm's chambers?
Standard chambers run -60°C to 180°C with 25% to 95% RH; conditioning models extend to -70°C to 150°C with 20% to 95% RH depending on configuration.
2. What sizes are available?
Benchtop units start at 50 litres and go up to 500 litres (TESTO series), with walk-in chambers scaling from 2,000 litres up to 10,000 litres for large batch testing.
3. What's the difference between a humidity test chamber and a conditioning chamber?
They're closely related — a conditioning chamber pre-conditions samples to a set temperature and humidity before further testing, while a humidity test chamber runs the full test cycle itself. Yatherm's units are built to do both.
4. What accuracy can I expect?
Temperature accuracy of ± 1°C and humidity accuracy of ± 2% on standard models, with tighter tolerances available on walk-in and customized units.
5. Can the chamber be monitored or controlled remotely?
Yes — the controller supports RS-232 connectivity, real-time graphing, and telephonic monitoring and control.
6. What safety features are included?
Circuit breaker protection, over-temperature protection, a door-opening alarm, and high/low temperature alarms, along with a DIN 12880 Class 3.1 independent temperature safety device on select models.
7. What industries typically use humidity test chambers?
Aerospace, automotive, home appliances, electronics, defense, food, pharmaceuticals and general scientific research.
8. What's the warranty on Yatherm humidity chambers?
Two years, with chambers built to ISO, UL and CE standards.
9. Can I get a custom temperature and humidity range for my specific application?
Yes — Yatherm builds tailor-made chambers with custom sizes, temperature ranges, and humidity ranges, using inbuilt heaters and water tanks for more precise control than external water sources allow.
Trying to figure out which size or configuration fits your product testing protocol? Get in touch with our team with your temperature range, humidity range and sample volume, and we'll help you size it correctly rather than guessing off a catalog number. And if a humidity-related failure has caught your product off guard before, share it in the comments — it usually helps the next person avoid the same expensive lesson.
