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LH-1.5-B - Temperature with Humidity


The LH-1.5 is a dynamic test chamber known for its ability to run unparalleled tight temperature and humidity control.

The test chamber is designed for minimal maintenance. Run long-term tests at a constant, steady-state temperature and humidity, or cycle testing with well-tuned reliability.

LH-1.5 model is a compact laboratory benchtop environmental test chamber. It's known for its exceptional ability to tune into and control temperature and humidity performance, within -20°C to +94°C (-4°F to +201.2°F) and 10% RH to 95% RH.

LH-1.5 test chambers feature heating systems equipped with open ceramic-core nichrome heaters for reliable and accurate temperature control within ±0.5°C.

The humidity system has a standard range between 10% RH and 95% RH. To extend your humidity range, see the optional features section.  

The cooling system in an LH-1.5 consists of a self-contained, compact, mechanical, single-stage refrigeration system. 

The LH-1.5 can be fitted onto an optional floor stand to increase mobility and lab testing flexibility. A stackable floor stand allows for two chambers in the same footprint. You save valuable lab space, gain more test workspace, or can run independent tests concurrently.

LH Series Test Chambers have incorporated AESONE CONNECT instrumentation creating a robust connected device for a standard and uniform interface making operation easier. Learn more in the Instrumentation Tab below.

Scaled Image of LH-1.5-B


Interior: 14.0W x 13.0D x 13.0H (in)
  355.5W x 330.2D x 330.2H (mm)
Exterior: 33.0W x 31.7D x 76.5H (in)
  838.2W x 805.2D x 1943.1H (mm)
Volume: 1.37 cubic ft
  38.77 liters
Temperature: -20°C to 94°C (-4°F to 201.2°F)
Humidity: 10-95% RH, limited by +4°C Td (for 98% add option)
Humidity Fluctuation: ±2% RH at sensor
Electrical Supply:  110 VAC, 1 PH, 60 HZ
Full Load Amps: 15 A
Power Requirement: NEMA 5-15
Mobility: Will fit through 32 in doorway

Standard Features


  • Temperature range: -20°C  to 94°C (-4°F to +201.2°F)
  • Two LH-1.5 test chambers
  • Stackable stand, with chamber mounting provisions, swivel locking casters
  • External cabinet construction consists of heavy-gauge, cold-rolled steel with powder coat, bone color, and textured matte finish
  • Internal workspace constructed with type 304 stainless steel
  • Full opening door with adjustable manual latch
  • Multipane 12 in x 12 in viewing window, no heat available
  • Interior light with exterior switch on cabinet face and operable on AESONE CONSOLE 
  • Fully adjustable shelf, one wire-grid stainless steel shelf 
  • Port configuration: left wall access port and plug with 3 in (76.2 mm) diameter
  • Gas purge control, compatible with desiccant air dryer and GN2
  • Forced air circulation
  • Air-cooled single-stage refrigeration system




CONTROLLER   AESONE CONNECT allows for secure remote access to your test chamber and gives easy profile creation, operational control, and data management.

LH Series Test Chambers have upgraded to include AESONE CONNECT creating a robust connected device for a standard and uniform interface making test chamber operation easier.

AESONE XCHANGE is hardware internal to the chamber that increases your functionality

  • Connects the test chamber controller to your network for increased accessibility
  • On-board multi-year data logging

AESONE SOFTWARE gives you the power to

  • Remote chamber operation and monitoring, 
  • Web-based test profile creation, 
  • Viewing current data and historical data visually
  • Secure multi-level user access 


WATLOW F4T PROGRAMMABLE CONTROLLER. Features a 4.3” capacitive touchscreen minimizing the chance for error. Ethernet communication supported by AESONE HARDWARE. View more controller options


  • TEMPERATURE SENSOR. Measured at the point of airflow entering the workspace. Class A, 3-wire, 100 Ohm Platinum RTD sensor
  • RELATIVE HUMIDITY SENSOR. Measured at the point of airflow entering the workspace. Speed of airflow does not affect measurement. Sensor is highly accurate between 10-95% RH, over the entire temperature operating range of -70°C to +180°C (-94°F to +356°F)
  • View sensor options

OPTIONAL DATA LOGGERS. View additional data loggers

Safety Features


  • HIGH/LOW TEMPERATURE CONTROL. An adjustable temperature limit controller allows you to program the highest lowest temperature the device under test, protecting products from compromising temperature exposure.
  • Internal high-temperature limit safety
  • Refrigeration system over-pressure safety circuit
  • Low-water steam generator over-temperature circuit
  • TUV Rheinland certified meeting UL 61010-1, US, C, E

Optional Features

  • Additional wire-grid, stainless steel shelves and shelf clips
  • Custom port sizes
  • Custom window sizes available, speak with a sales team member
  • Water demineralizer cartridge system
  • Self-contained water recirculating system
  • High humidity sensor to extend the humidity range up to 98% RH
  • Desiccant air dryer to reach conditions as low as 5% RH 
  • Dry nitrogen purge to keep condensation and frost from accumulating on DUT surfaces at cold temperatures and prevent oxidation of metal surfaces at high temperatures