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AES is proud to offer a variety of controllers with our environmental test chambers. From simple push buttons to beautiful touch screen displays, we have the PID controllers to fit your needs. Most of our controllers can be programmed with profiles to run a long test with any variety of conditions that your chamber can handle. 

Standard on all LH, FD, HD, SM, SD,SC, SCH, BHD, & Walk-In Series Environmental Test Chambers

You can now monitor your environmental testing away from the chamber. Enabling communication, AESONE XCHANGE is hardware that lives inside your test chamber opening a world of access.

When AESONE XCHANGE is connected to your test chamber’s controller and your company network, you get access to AESONE CONSOLE. A web-based dashboard view lets you monitor your test chamber remotely as a device is undergoing test. The home page is a side-by-side view of the setpoints and current temperature and humidity, and a customizable graph. AESONE CONSOLE software allows you to operate your chamber on a full-screen monitor at your desk or remotely on a laptop or tablet. View real-time readings, and control your chamber's temperature and humidity. 

A full-screen-mode graph allows you to view and monitor live and historical data with a pause-and-resume feature while the chamber is running a test profile. 

From a web browser, you can move between profiles, create new profiles, edit, and save them. The profile builder uses an easy drag-and-drop interface that makes choosing steps and rearranging test profile steps a breeze. 

Using a shared chamber is not a problem with AESONE XCHANGE security features, which decrease test interference with three authentication methods and six permission levels controlled only by the administrator.  

Dimensions:  Embedded software allows you to work on a full screen at your desktop or remotely on a laptop or tablet. Ask for the optional touchscreen monitor to mount on the chamber for full-screen access, or plug your laptop in when you're working at the chamber.

Analog Inputs: Up to 24* (dependent on controller configuration)

Networking: Ethernet, JSON API, python scripts

Data Storage: Internal flash memory

Capacity Before Reset: Up to 8 years of continuous recording* (dependent on data logging settings)

Standard on all FD, HD, SM, SD, SC,SCH, BHD, & Walk-In Series Environmental Test Chambers

The F4T has 4-channel control as well as easy-to-set-up custom profiles. This enables you to easily adjust profiles in the controller without having to worry about deleting or messing up pre-existing profiles. The F4T has Modbus over TCP, RS-232, and RS-485 communication capability. The ability to connect to optional data-logging is available via after-market auxiliary computer-based software.

Control/Limit Loops: 4/4

Alarms: Up to 14

Mounting: Front panel or flush mount

Profile: Yes

Max Output: 10A SSR

Ambient Operating Range: -18 to +50 C°

Data Logging: Yes (Optional)

Communication Protocols: Standard Bus, Modbus TCP, Modbus RTU, SCPI, USB 2.0

Optional Protocols: IEEE-488 GPIB

Screen Type: 4.3" PCAP color graphical touch

Documentation: Watlow F4T 

Example Profile: F4T Controller Example Profile

Standard on all LH, BD, MX Series Environmental Test Chambers

The Watlow EZ-ZONE PM is a push-button controller with segmented displays. It has optional RS-232 or RS-485 serial communication. This controller is standard on LH, BD, and MX Series environmental test chambers. 

Control/Limit Loops: 1/1

Alarms: 2

Mounting: 11/32, 1/16 DIN front panel

Profile: No

Max Output: 15A

Ambient Operating Range: -18 to +65 C°

Data Logging: No

Communication Protocols: Modbus RTU

Optional Protocols: Modbus TCP, IEEE-488 GPIB

Screen Type: LCD Segmented Display

Documentation: Watlow PM

Optional Feature: This controller is no longer a standard product on AES environmental test chambers.

The Retro F4 can also be used with after-market auxiliary computer-based software. The F4 comes with standard RS-232 or RS-485 and has an optional adapter board for Modbus or TCP Ethernet, IEEE-488, or GPIB.

Control/Limit Loops: 2/0

Alarms: 2

Mounting: 1/4 DIN front panel

Profile: Yes

Max Output: 2A

Ambient Operating Range: 0 to +55 C°

Data Logging: No

Communication Protocols: Modbus RTU

Optional Protocols Modbus: TCP, IEEE-488 GPIB

Screen Type: Backlit LED Segmented Display, 4 Lines, 40 characters each

Documentation: Watlow F4


Technician providing callibration

One of the most important things while running product tests is to record your data for review. At AES, we offer multiple types of chart recorders to give our customers a variety of data recording options. From circular pen chart recorders to a web-based exchange board we can handle any data logging needs our customers have. 



With on-board, multi-year data logging abilities, collect and manage live and historical data. You can view and analyze data with pause and resume control of live plotting.

An interactive activity log records what the chamber calls for and allows you to add entries as you view the events currently being logged. 

Additionally, you can create custom datalog reports that allow you to zoom in on specific data points in a vivid graph or zoom out for an overall understanding of the profile behaviors.  You can look at custom specified date ranges including up to 8 years of data in the on-board archives. 

Custom color settings can be assigned, allowing you ultimate control when you are viewing your graph. Easily share data with collaborators or download the data at any point during or after testing has finished, either as a CSV or TSV file for permanent records.

Analog Inputs: Up to 24* (dependent on controller configuration)

Networking: Ethernet, JSON API, python scripts

Data Storage: Internal flash memory

Capacity Before Reset: Up to 8 years of continuous recording* (dependent on data logging settings)



This paperless controller digitally and securely stores data on a 1 GB internal non-volatile memory. There are USB and SD card memory keys to retrieve the data after collection, and it has ethernet networking capabilities. The eZtrend comes with a 5.7-inch, color-active TFT-type display and supports up to 12 directly connected analog inputs that handle T/C, RTD, and Linear input sensor types.

Dimensions: 5.7-inch touchscreen

Analog Inputs: Up to 12

Networking: Ethernet

Data Storage: USB and SD

Capacity Before Reset: 1 GB of Data (expandable to 2 GB)



This paper circular chart recorder, available in 10- or 12-inch diameters, is microprocessor-based and comes with a digital display. The Truline accepts directly connected process signals, allowing them to process data and create the chart under actual environmental conditions. This eliminates the risk of expansion of the paper from temperature and humidity.

Dimensions: 10- or 12-inch circular chart

Analog Inputs: 2

Networking: Modbus RTU

Data Storage: Paper

Capacity Before Reset: One, 12-inch circular chart paper



Accurate readings of what is going on inside the environmental test chamber is incredibly important. We pride ourselves on the quality and functionality of our chambers and part of ensuring that is the sensors we use. To ensure that our temperatures can hold up to the high testing standards of our clients we use high-quality sensors to get the most accurate temperature and humidity readings.

  Type J, Type T 100 OHM Platinum
Description We have a variety of thermocouples available with a variety of temperature ranges and sensitivities. RTD sensor that can operate from -200 C to 650 C. Platinum resistance elements are specially designed to ensure precise and repeatable temperature measurement. RTDs and thermistors are accurate, sensitive, standardized and interchangeable.
Range J: -40 °C to 750 °C
T: -200 °C to 350 °C
-200 °C to 650 °C
Accuracy J: +/- 2.2 °C
T: +/- 1.5 °C
+/- .06% at 32 °F
  Standard Humidity Sensor
Chilled Mirror
Chilled Mirror
Description The sensor measures temperature, relative humidity and the dew or frost point and is designed for OEM applications. The transmitter consists of a probe that is hard wired to a small open board with a 2 m / 6.5 ft cable. This sensor offers fast response and exceptional stability, even in high humidity environments. Sensor durability has proven to be excellent in a wide range of applications. High accuracy humidity sensor with a range of 0 to 100% RH and -40 to 80°C. The most accurate humidity sensor that we offer. The chilled mirror humidity sensor provides one of the true direct physical measurements of humidity and is the most accurate method of measuring humidity above 5%RH.
Range -20 to 75 °C -40 to 80 °C -60 to 100 °C
Range (Humidity) 20 to 80% RH 0 to 100% RH 5 to 100% RH
Accuracy +/- 2.5% and .6 °C +/- 1.5% and +/-.4 °C +/- 1.5% and .15 °C
  Toxic Gas Sensor
Toxic Gas Sensor
Oxygen Sensor
Oxygen Sensor
Description A network enabled Gas Sensor Module with the brilliance to provide Sentry, 4-20 mA or Modbus output. A true loop powered (14-32 VDC) trace oxygen transmitter designed to provide accurate and dependable trace oxygen measurements in a variety of background gases. Measurement ranges available are from 0-10 PPM to 0-20,000 PPM. A 4-20 mADC output is provided that can be used with a data logger, recorder, PLC, DCS, etc. Options include pressure regulators, flow meters, sample filters, and explosion proof (NEMA 7) housings.
Range -20 to 50 °C 5 to 40 °C
Range (Humidity) 15-99% RH  
Material   Available explosive proof housing conformant with NEMA 7 protocols
Accuracy +/- 1 PPM 1% of full scale