Cleanroom Chamber - CL Series

CLO34 Cleanroom Chamber

CL Series Overview

The CL series chambers are used for a variety of research applications. These units are specifically made for a cleanroom environment. The CL series cleanroom chambers include heating and cooling capabilities. These units have lower temperature capabilities than our thermoelectrically cooled units, have associated greater heat removal capabilities, and are ideal for locations where the ambient conditions cannot be controlled very well. These units will also outperform our thermoelectric units where specifications call for fast “open door” recovery times.


The CL034 is a single-door chamber designed for maximum capacity while still allowing passage through most commercial doorways.

Cabinet Construction

  • Standard model features grade 304 stainless steel 18-gauge, #4 finish
  • Two, 2" I.D access ports (one on each side) with access port cover and insulation plug located on side wall of the chamber.


  • Fully welded and sealed door with magnetic gaskets. Has a heavy-duty grade 304 stainless steel latch that ensures secure closure after door opening


  • Entire cabinet structure and doors insulated using minimum 2” non-cfc- polyurethane insulation.
  • Insulation manufacturer utilizes CFC free blowing agent that has zero ODP.


  • Unit completely pre-wired at factory, and ready for final connection to a 115/60/1 phase – 15 amp dedicated (recommended) outlet. Unit runs approx. 6RLA under test conditions.
  • A 9 ft cord with NEMA 5-15P plug is included.
  • A sole use circuit is recommended

  • Unit also equipped with 3 grade 304 stainless steel shelves
  • Shelves capable of supporting up to 100 lbs of evenly distributed weight.
  • Full height shelf support pilasters, with double oblong holes on ½” centers. Pilasters made of the same material as cabinet interior. Four (4) chrome plated, stainless steel shelf clips to be included for each shelf.

Refrigeration System

  • Unsurpassed temperature control through continuous refrigeration bypass system
  • Refrigeration system factory balanced using CFC free 134A refrigerant
  • Top mounted air-cooled condensing unit
  • Factory pre-engineered capillary tube system with over-sized condenser and evaporator to reduce product pull down time and to consistently maintain interior cabinet temperature (non-adjustable capillary tube system superior to problematic expansion valve).
  • Evaporator- epoxy-coated at the time of manufacture to eliminate the potential of corrosion.

Performance Standard Customized Option
Temperature Range 4º C to 37º C -5º C to 70º C
Ambient Temperature 21º C ± 3º C Low Temp. and High Temp. Ambient Available
Temperature Control ± 0.2º C Available
Temperature Uniformity ± 1º C Available
Control Resolution 0.1º C Available
Temperature Sensor NIST Traceable PT100 RTD Class A Available
Control System Standard Customized Option
Controller Fuji PXF4 (PID - Fuzzy Logic) West EC-44, Future Design Touchpad, Watlow, Allen Bradley
Control Readout Actual and Set-Point Values Trending, Duty Cycle
Calibration Corrrection Capability Standard 0.1 Resolution Available
Uniformity Off Set N/A N/A
Alarm Audible and Visual Text, Email, Web Server, Remote Access
Alarm Type Deviation in 0.1º C or 0.1% RH with Delay Absolute 0.1 Resolution with Delay
Remote Monitoring Dry Alarm Contact, RS 485 & Analog Output Ethernet
Password Protection Numeric Numeric, Alpha Numeric
Audit Trail N/A Available
Uninterrupted Power Supply (Monitoring) N/A Available
Construction Standard Customized Option
Exterior 18 gauge 304 Grade Stainless Steel, #4 finish 316 Grade Stainless Steel 18-guage, #4 finish
Interior 18 gauge 304 Grade Stainless Steel, #4 finish 316 Grade Stainless Steel -18 gauge, #4 finish
Shelving 3; 304 grade Stainless Steel Shelves, Supports
Up to 100 lbs of Evenly Distributed Weight
Custom sheet metal shelf per customer specification
Legs/ Casters 2.75”. Total Weight Capacity is 300 lbs per Caster (not Including
the weight of the chamber).
Chamber can be placed directly on floor without casters
Panel Insulation Minimum 2" thick insulation; closed cell polyisocyanurate
(polyiso) foam core and polyurethane insulation.
Doors 18 gauge 304 Grade Stainless Steel, #4 finish welded seams.
Door is installed with 2 left hinges. Door is reversible- please
specify swing direction. * refer to drawing for standard door
Access Port 2" I.D access port, cover and installed plug. Customizabe access port size and location available.
Capacity & Dimensions US Standard Metric
Interior Capacity 29.58 ft3 837.6 liters
External Dimensions 34”W x 35”D x 80.5”H 86.36cm W x 88.9cm D x 204cm H
Internal Dimensions 29.5” W x 29.75” D x 58.25” H 74.93cm W x 76.2cm D x 160.973cm H
Shelf Dimensions 28.75” W x 26” D 54.61 cm W x 66.68 cm D
Crated Weight 745 lbs 338 kg
Utilities US Standard International
Voltage (dedicated circuit required) 115 / 60 / 1 230 / 50 / 1
RLA 8 2.74m
Cord Length 9 ft long cord with NEMA 5-15P Plug 4 With Step Down Transformer
Drain Line Chambers are equipped with 1/2" polytube. Floor drain or
sink required adjacent to chamber
Condensate pump option available, if floor drain is not
available nearby

Frequently Asked Questions (FAQs) About Cleanroom Chambers

What Are Cleanroom Chambers?

Cleanrooms are specially designed environments with controlled levels of airborne particles, temperature, humidity, and other factors that minimize contamination and maintain a sterile or ultra-clean condition. They are commonly used in industries such as pharmaceuticals, biotechnology, electronics manufacturing, aerospace, and healthcare to ensure the quality and integrity of products and processes. Cleanrooms typically have strict protocols for entry and operation to prevent the introduction of contaminants. They are essential for industries where even small particles or microbes can compromise the safety, quality, or functionality of products.

What Industries Use Cleanroom Chambers?

Here are a few of the major industries that require cleanrooms and sterile chamber environments:

  • Pharmaceutical and Biotechnology: Manufacturing drugs, vaccines, and biologics to prevent contamination and ensure product purity.
  • Electronics Manufacturing: Creating semiconductors, microchips, and electronic components rely on cleanrooms to protect sensitive equipment from dust and particulate contamination.
  • Aerospace and Defense: Assembling and testing spacecraft, satellites, and military equipment to maintain precise tolerances and prevent damage from foreign particles.
  • Healthcare: Hospitals and medical facilities may have cleanrooms for compounding sterile medications, handling hazardous drugs, or conducting surgeries.
  • Food Processing: Certain food industries, such as dairy or meat processing, utilize cleanrooms to maintain sanitary conditions and prevent microbial contamination.
  • Automotive and Aerospace: Companies producing automotive paints or aerospace coatings require cleanrooms to achieve high-quality finishes and prevent defects like dust or lint contamination.
  • Research Laboratories: Academic and industrial research labs use cleanrooms for various applications, including nanotechnology research, materials science, and biomedical research.
  • Semiconductor and Microelectronic Manufacturers: Cleanrooms are critical for fabricating integrated circuits, microprocessors, and other semiconductor devices to maintain high yields and product reliability.

What Are the Specifications for Cleanroom Chambers?

  • Cleanliness Class: Cleanrooms are classified based on the maximum allowable concentration of airborne particles per cubic meter of air, as defined by international standards such as ISO 14644-1. Cleanliness classes range from ISO Class 1 (the strictest) to ISO Class 9 (the least strict).
  • Airborne Particle Count: Cleanrooms specify the maximum allowable concentration of airborne particles of various sizes, typically measured in particles per cubic meter (e.g., ≤ 0.5 µm, ≤ 5 µm, ≤ 10 µm). Particle counts are monitored and controlled using particle counters.
  • Temperature Control: Cleanrooms maintain precise temperature levels within specified tolerances to ensure optimal conditions for the processes conducted within them. Temperature specifications vary depending on the requirements of the application.
  • Humidity Control: Cleanrooms control humidity levels to prevent condensation, static electricity buildup, and microbial growth. Humidity specifications are expressed as relative humidity (RH) and are typically maintained within defined ranges.
  • Airflow Velocity: Cleanrooms specify airflow velocity to ensure adequate air exchange and uniform distribution of filtered air throughout the room. Air velocity is measured and controlled using airflow monitors and adjustable ventilation systems.
  • Pressure Differentials: Cleanrooms maintain pressure differentials between adjacent spaces to control the direction of airflow and prevent the migration of contaminants. Positive pressure is often maintained in cleanrooms relative to surrounding areas to minimize the ingress of contaminants.
  • Filtration Efficiency: Cleanrooms use high-efficiency particulate air (HEPA) or ultra-low penetration air (ULPA) filters to remove airborne particles and microorganisms. Filtration efficiency is specified based on the filter's ability to capture particles of specific sizes.
  • Cleanroom Classification: Cleanrooms are classified based on their intended use, cleanliness level, and specific requirements of the application. Common classifications include pharmaceutical cleanrooms (e.g., GMP-compliant), semiconductor cleanrooms, biotechnology cleanrooms, and medical device manufacturing cleanrooms.

What Are Cleanroom Pass-Through Chambers?

Cleanroom chambers are units designed to allow materials to be tested in extremely controlled environments that follow FDA/ICH regulations. There are several applications for cleanroom chambers based on your industry and the level of scrutiny you need to meet. Cleanrooms are used to test HVAC and plumbing products, fire safety materials, environmental air scrubbers, and other equipment.

Cleanroom pass-through chambers are engineered to establish a particle-free environment, eliminating contaminants like dust, mold, and microorganisms. Operating as a subset of controlled environments, they uphold strict environmental controls while remaining isolated from external surroundings.

For researchers and employees, pass-through chambers save on time spent going in and out of a cleanroom environment.