LGO box furnace 1200 °C with patented heating elements and Moldatherm insulation

The Thermo Scientific Lindberg Blue M LGO box furnace is the most advanced box furnace in the Lindberg Blue M line. As a result, this model combines patented LGO heating elements, Moldatherm ceramic fiber insulation, and a Platinel II thermocouple for stable operation up to 1200 °C. Specifically, uniformity is ± 2.0 °C at 1100 °C, with variable heatup rate preventing thermal shock to materials. Furthermore, self-tuning PID control provides optimal thermal processes without temperature overshoot.

Patented LGO heating elements

The most distinctive feature of this furnace is the LGO heating element (Light Gauge Overbend). Specifically, this patented design delivers exceptional energy release, fast heatup and recovery, plus reduced thermal process cycle time. As a result, you save time and energy at high sample throughput. Furthermore, the LGO element combines with Moldatherm insulation for efficient heat transfer to the chamber.

Two capacities with different door styles

Specifically, you choose from two capacities, each with its own door design:

• 16.4 liter with vertical-lift door: Interior dimensions 27.9 × 33 × 17.8 cm, exterior dimensions 58.4 × 61 × 68.6 cm, weight 75 kg. Notably, this model includes one central shelf position with the supplied two-part shelf. Power is 4500 W.
• 55.3 liter with horizontal side-swing door: Interior dimensions 38.1 × 38.1 × 38.1 cm, exterior dimensions 71.3 × 73.7 × 83.8 cm, weight 127 kg. Furthermore, this model has three shelf positions. Power is 5800 W.

Moreover, both models require hardwiring by a qualified technician, because the high power level does not allow a standard plug.

Three controller choices for any process

Specifically, you choose from three PID microprocessor controllers, all with adjustable high-limit OTP:

• Single program 8 segments (suffix 31C-1 / 41C-1): Digital single program with 8 segments plus additional dwell timer, delay timer, or soft start timer. Suited for applications with one structured thermal profile.
• 5 programs, 16 segments (suffix 32C-1 / 42C-1): Digital 5-program with 16 segments per program. Notably, a dual display shows actual temperature and setpoint simultaneously.
• 25 programs, 500 segments (suffix 32PC-1 / 42PC-1): Digital 25-program with 500 segments per program. As a result, extremely complex thermal profiles become possible, with cycles that can repeat up to 999 times. In addition, this controller features a 5-digit LED display plus an LCD with trend recording function.

Furthermore, each controller choice offers optional RS-485 communications (suffix COMC-1) for remote monitoring and data logging from a PC.

Optional OTC over-temperature control

Moreover, OTC (over-temperature control) is optionally available on models with “B” in the suffix. Specifically, OTC works with an independent thermocouple and secondary controller that override the main controller and shut off power when the high limit is reached. As a result, OTC provides an extra backup safety layer on top of standard OTP. In addition, OTC requires manual reset, which prevents unintended restart after an over-temperature event.

Flowmeter option for gas flow control

Specifically, a flowmeter is optionally available on models with “FM” in the suffix. Notably, this built-in gas flowmeter delivers adjustable flow from 28 to 283 liter per hour (1.0 to 10.0 cu. ft./hr), controlled via the front panel. As a result, control of inert gas or air supply to the chamber becomes possible, suited for air exchange in ashing applications. Furthermore, there is an important limitation: the flowmeter is not suitable for combustible or volatile gases, and the door is not fully gas-tight.

Applications in lab and industry

Specifically, this LGO box furnace is used for demanding thermal processes up to 1200 °C, including:

• Sintering and hardening at high temperatures
• Ashing with air supply for gravimetric analysis
• Materials research in inert gas atmosphere
• Industrial quality control and production processes
• Pyrolysis and thermal decomposition
• Advanced research with complex temperature profiles

In addition, this model is regularly used in pharmaceutical development, biotechnology, and advanced materials research where both high temperatures and precise process control are required.

Safety and operation

Moreover, this box furnace features multiple safety layers. Specifically, the door switch interrupts power to the heating element when the door opens. Furthermore, self-tuning PID control prevents temperature overshoot during heatup. Notably, adjustable high-limit OTP provides a standard protection layer, with optional OTC as an additional backup. In addition, the LED display shows actual temperature versus setpoint in either °C or °F. Specifically, the unit features an air vent on top (2.54 cm diameter) and an air inlet at the rear (0.95 cm diameter) for inert atmosphere exchange.

Standard and optional accessories

Each LGO box furnace ships with a Platinel II thermocouple for long-term stability, a Moldatherm hearth plate for spillage protection, and a two-part shelf (one shelf position for 16.4 L, three shelf positions for 55.3 L). As a result, the unit is immediately ready for applications up to 1200 °C without additional investment. Furthermore, several options are available: OTC over-temperature control, built-in flowmeter, and RS-485 communications port for remote monitoring.

Note: all models require hardwiring by a qualified technician. Specifically, no plug or power cord is supplied, because the power ranging from 4500 W (16.4 L) to 5800 W (55.3 L) demands a fixed electrical connection.