Product Description
Tenney Junior (TJR/TU-JR) Environmental Test Chamber – Compact Temperature Chamber for Electronics, Military, and Pharmaceutical Testing
This used Tenney Junior is a self-contained, benchtop or upright temperature test chamber designed for reliable and accurate environmental conditioning. With a temperature range of -75°C to +200°C and precise control of ±0.3°C , it is well-suited for electronic, military, and pharmaceutical quality assurance and reliability testing, as well as research and production processes .
The chamber uses a two-stage (cascade) refrigeration system with non-CFC refrigerants for cooling and low-mass nichrome open-wire heaters for heating . It features a vapor-tight, continuously welded stainless steel interior for maximum durability . Standard models include a Watlow 942 programmable temperature controller with 24-step profile capability . A 3″ diameter access port is provided for running test leads .
Condition Note: This unit is untested and sold as-is. No shelves, documentation, or accessories are guaranteed unless specified. The unit requires 120V, 1-phase, 60Hz power and draws approximately 16-18 amps .
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | Tenney Environmental / Thermal Product Solutions |
| Model | TJR (Benchtop) or TU-JR (Upright) |
| Temperature Range | -75°C to +200°C (-73°C to +177°C per NSN spec) |
| Control Tolerance | ±0.3°C |
| Chamber Volume | 1.12 cu ft (31.7 liters) |
| Interior Dimensions (W x D x H) | 16″ x 11″ x 11.75″ (some variants 14″ x 10″ x 10″) |
| Exterior Dimensions (W x D x H) | 25.75″ x 22″ x 60″ (upright) |
| Weight | ~292 lbs (unit), ~365 lbs (crated) |
| Refrigeration | Two 1/2 HP compressors (cascade) |
| Heater Capacity | 500W |
| Controller | Watlow 942 (standard), Watlow F4 (optional) |
| Power Requirements | 120V, 1-Phase, 60Hz, 16-18A (20A fuse) |
| Access Port | 3″ diameter on left side |
| Interior Material | Stainless steel (vapor-tight, continuously welded) |
| NSN (National Stock Number) | 6636-00-298-8713 |
| Condition | Used – Untested |
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Wide Temperature Range (-75°C to +200°C) | Suitable for a broad range of thermal cycling, shock, and component testing applications |
| Precise Control (±0.3°C) | Ensures accurate, repeatable test conditions |
| Compact 1.12 cu ft Interior | Space-saving design for benchtop or upright lab use |
| Cascade Refrigeration System | Provides rapid, reliable cooling to ultra-low temperatures |
| Stainless Steel Interior | Durable, corrosion-resistant, and easy to clean |
| Watlow 942 Programmable Controller | 24-step profile capability for complex temperature sequences |
| 3″ Access Port | Allows test leads and sensors to enter the chamber without compromising sealing |
| Field-Proven Reliability | Thousands of units in use worldwide for over 50 years |
| NSN Registered | Confirms military and government acceptance |
Applications
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Electronics Testing: Thermal cycling of PCBs, semiconductors, and electronic components
-
Military & Aerospace QA: Reliability testing per MIL-STD requirements
-
Pharmaceutical Testing: Stability and storage condition simulation
-
Materials Characterization: Thermal properties testing of materials
-
R&D Laboratories: Controlled temperature experiments in research settings
