The Tenney JR (Tenney Junior) is a compact, benchtop environmental test chamber designed for high-performance temperature testing. Engineered by Thermal Product Solutions (TPS), it features a cascade refrigeration system capable of reaching ultra-low temperatures, paired with robust construction and advanced controller options to meet rigorous laboratory and quality control standards.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | RS-232 / RS-485 (standard with Watlow F4); Ethernet / USB / Modbus RTU (standard with Watlow F4T or Synergy Nano) |
| Display | Watlow F4T Color Touchscreen, Synergy Nano Touchscreen, or Watlow F4 1/4 DIN LCD (model/option dependent) |
| Manufacturing Origin | USA |
| Product Family | Benchtop Temperature Test Chambers |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | -75°C to 200°C |
| Dimensions (W×H×D) | External: 37" x 30" x 22.5" (940 mm x 762 mm x 572 mm) (W×H×D) |
| Weight | 118 kg |
Temperature & Climate Performance
| Parameter | Value |
|---|---|
| Temperature Range | -75°C to +200°C |
| Temperature Control Tolerance | ±0.3°C after stabilization |
| Ultimate Low Temperature | -75°C |
| Ultimate High Temperature | +200°C |
| Average Heating Rate | Ambient to 200°C in 60 minutes |
| Average Cooling Rate | Ambient to -65°C in 50 minutes |
Chamber Construction & Geometry
| Parameter | Value |
|---|---|
| Internal Volume | 1.25 cu. ft. (35 L) |
| Internal Width | 16 inches (406 mm) |
| Internal Depth | 11 inches (279 mm) |
| Internal Height | 12 inches (305 mm) |
| External Width | 37 inches (940 mm) |
| External Depth | 22.5 inches (572 mm) |
| External Height | 30.25 inches (768 mm) |
| Interior Construction Material | 304 Stainless Steel, continuously welded |
| Exterior Construction Material | Heavy-gauge cold-rolled steel with baked-on powder coat finish |
| Viewing Window Dimensions | 2" x 2" (51 mm x 51 mm) multi-pane heated glass window |
| Access Port Quantity & Diameter | One 3-inch (76 mm) diameter port standard |
| Access Port Location | Left side, centered |
| Door Gasket Material | High-temperature silicone rubber |
| Door Hinge Side | Left hinged (right-hand pull) |
Refrigeration & Heating Systems
| Parameter | Value |
|---|---|
| Refrigeration Type | Cascade system |
| Compressor Horsepower | Two 1/4 HP hermetic compressors |
| First-Stage Refrigerant Charge Type | R-449A / R-404A (configuration dependent) |
| Second-Stage Refrigerant Charge Type | R-508B |
| Condenser Cooling Method | Air-cooled |
| Heating Element Type | Nichrome wire open-element heaters |
| Heating Capacity | 0.5 kW |
Control System & User Interface
| Parameter | Value |
|---|---|
| Controller Model | Watlow F4T or Synergy Nano (modern config) |
Shelving & Loading Specifications
| Parameter | Value |
|---|---|
| Standard Shelf Count Included | 1 wire mesh shelf |
| Shelf Construction Material | Stainless steel wire mesh |
Power & Utility Requirements
| Parameter | Value |
|---|---|
| Input Voltage | 120 VAC |
| Electrical Phase | 1-Phase |
| Electrical Frequency | 60 Hz |
| Full Load Amps (FLA) | 16 A |
| NEMA Plug Configuration Type | NEMA 5-20P |
Safety & System Protection
| Parameter | Value |
|---|---|
| Over-Temperature Safety Limit Controller | TempGard independent limit controller standard |
Physical, Environmental & Compliance
| Parameter | Value |
|---|---|
| Net Equipment Weight | 260 lbs (118 kg) |
| Gross Shipping Weight | 330 lbs (150 kg) |
Performance & Control
| Parameter | Value |
|---|---|
| Temperature Sensor | Platinum RTD |
| Live Load Capacity at 0°C | 220 W |
| Live Load Capacity at -40°C | 130 W |
| Live Load Capacity at -56°C | 50 W |
| Heat-Up Time (Ambient to +200°C) | 40 min (approximate, performance-dependent) |
| Pull-Down Time (Ambient to -73°C) | 55 min (approximate, performance-dependent) |
Airflow & Ventilation
| Parameter | Value |
|---|---|
| Air Circulation Rate | 70 CFM |
| Airflow Pattern | Vertical recirculating |
Physical & Interior
| Parameter | Value |
|---|---|
| Maximum Shelf Positions | 3 |
| Interior Construction Style | Continuously welded vapor-tight stainless steel |
Compliance & Standards
| Parameter | Value |
|---|---|
| Manufacturer Quality Certification | ISO 9001 |
Control System
| Parameter | Value |
|---|---|
| Control System Type | Microprocessor-based PID controller |
Technology
Cascade Refrigeration / Electric Heating
Applications
Benchtop Environmental and Temperature Testing