Bench Ovens
Quincy Lab bench series ovens have been the workhorse in the industry for over 40 years. These time-tested bench ovens feature a redesigned chamber and air flow distribution system, improved cabinet insulation, and an optional PID microprocessor temperature controller (ER MODELS), making the bench series an easy choice for heating applications everywhere.
Developed for the industrial lab, these rugged general-purpose ovens are perfect for preheating, thermal testing, self-batch processing, part drying, curing, baking, evaporating, or dehydrating various media, soils or aggregate, and many other applications. All models feature large work spaces and excellent portability. They can be moved to the job, or stacked on one another to conserve space.
Key Features
- Large bench or portable capacity
- All encompassing circular air flow
- ER Model programmable PID control
- 80 lb capacity shelves
- Rapid run-up and recovery
- Proven reliability
- Full 18 month factory warranty
- Shelves can be spaced on 1.5" centers to provide up to 56 square feet of shelf surface (31-350)
- Cabinet exteriors finished in exclusive Q-Lab "high-tech" bronze polyester
- Large high-impact thermal plastic door handles remain cool to the touch
Design and Construction
A virtual non-contact exterior to interior cabinet design and high-density industrial thermal fiber insulation greatly reduce thermal conductive transfer, resulting in greater energy efficiency and lower exterior wall temperatures. Refinements in the air plenums and mixing chamber deliver an evenly heated horizontal circular flow of air for rapid heat to part transfer. A reliable quick-sensing hydraulic thermostat balances good temperature stability with recovery performance. Heavy-duty chrome plated wire shelves can support 80 lbs.
Available Models
- Model 21-250
- Model 21-350ER - 7 ft³, 300°F (150°C)
- Model 21-350 - 7 ft³, 300°F (150°C)
- Model 31-350 - 10 ft³, 450°F (235°C)
- Model 51-550 - 550°F (288°C)
General Specifications
| Specification |
Model 21-250 |
Model 21-350 |
Model 31-350 |
Model 51-550 |
| Interior Dimensions (W x H x D) |
25.5 x 19.75 x 24 inches
(64.7 x 50 x 61 cm) |
25.5 x 19.75 x 24 inches
(64.7 x 50 x 61 cm) |
25.5 x 19.75 x 22.5 inches
(64.7 x 50 x 57 cm) |
25.5 x 30 x 24 inches
(64.7 x 76 x 61 cm) |
| Exterior Dimensions (W x H x D) |
33 x 24 x 35.5 inches
(83 x 61 x 90 cm) |
33 x 24 x 35.5 inches
(83 x 61 x 90 cm) |
33 x 34 x 35.5 inches
(83 x 86 x 90 cm) |
33 x 24 x 35.5 inches
(83 x 60 x 90 cm) |
| Temperature Range |
Ambient +25°F min. to 300°F (150°C) |
Ambient +25°F min. to 450°F (232°C) |
Ambient +25°F min. to 450°F (232°C) |
Ambient +25°F min. to 550°F (287°C) |
| Capacity |
7 cubic feet (198 liters) |
7 cubic feet (198 liters) |
6.60 cubic feet (185 liters) |
10.6 cubic feet (300 liters) |
| Electrical |
115V/9.2A, 1050W
Plug: NEMA 5-15P |
120V/16A, 1920W
Plug: NEMA 5-20P |
120V/16A, 1920W
Plug: NEMA 5-20P |
230V/12.5A, 3000W
Plug: NEMA 6-20P |
| Maximum Shelves per Unit |
11 |
11 |
17 |
11 |
| Maximum Pounds per Shelf |
80 |
80 |
80 |
80 |
| Weight - Shipping |
185 lbs (stand alone 165 lbs) |
225 lbs (stand alone 200 lbs) |
195 lbs (stand alone 170 lbs) |
186 lbs |
Note: 230 Volt optional on models 21 and 31
Performance Characteristics
| Characteristic |
Model 21-250/ER |
Model 21-350/ER |
Model 31-350/ER |
Model 51-550/ER |
| Control Stability @ 100°C |
±2.0 ± 0.2°C |
±2.0 ± 0.3°C |
±2.5 ± 0.5°C |
±2.5 ± 0.5°C |
| Control Stability @ 200°C |
NA |
±2.5 ± 2.0°C |
±2.5 ± 2.0°C |
±3.0 ± 0.5°C |
| Uniformity @ 100°C |
±3.0 ± 0.5°C |
±3.0 ± 0.5°C |
±3.5 ± 4.0°C |
±3.5 ± 0.5°C |
| Uniformity @ 200°C |
NA |
±3.0 ± 2.0°C |
±4.0 ± 3.0°C |
±3.5 ± 2.5°C |
| Time to Temperature - Ambient to 100°C |
15 min. / 16 min. |
8 min. / 9 min. |
9 min. / 10 min. |
±5.5 ± 4.5°C |
| Time to Temperature - Ambient to Max |
36 min. / 38 min. |
30 min. / 32 min. |
35 min. / 38 min. |
3 min. / 6 min. |
| Recovery @ 150°C - Door Open 15 Sec. |
4 min. / 5 min. |
2 min. / 3 min. |
3 min. / 4 min. |
40 min. / 45 min. |
| Recovery @ 150°C - Door Open 30 Sec. |
5 min. / 6 min. |
3 min. / 4 min. |
4 min. / 5 min. |
1 min. / 2 min. |
| Repeatability @ 150°C (Set Point Drift) |
±2.0 / 0.5°C |
±1.0 / 0.5°C |
±1.5 / 0.5°C |
2 min. / 3 min. |
| Evaporation Rate @ 110°C ±5 (230°F ±9) per ASTM C88 |
30-35 g/h |
30-35 g/h |
30-35 g/h |
±2.0 / 0.75°C |
| Air Changes Max/Hour @ 150°C with No Load |
8 to 12 |
8 to 12 |
8 to 12 |
30-35 g/h |
| Max Chamber Air Velocity |
7 ft/sec. |
7 ft/sec. |
7 ft/sec. |
8 to 12 |
Note: Performance characteristics for standard voltage models; alternate voltage models may vary. All tests conducted under controlled laboratory conditions. Repeatability or set point drift measured for 24 hours with controlled lab ambient temperatures not varying more than 2 degrees C and supply voltage by not more than 2%.
Clearance Requirements
6" minimum from wall to back of blower housing.
