The XLG furnaces are multi-purpose gas fired box furnaces. They are highly uniform in temperature and feature accurate digital controls and multiple medium or high velocity Eclipse "Thermjet" proportionally controlled burners with an independent combustion blower. The XLG furnaces can be rated as high as 2400°F (1315ºC) although typical rating is 2000ºF (1093ºC). Connected gas pressure can be as low as 1 PSI. Firing with gas can be more economical than firing with electricity. In addition, the circulation of the hot gases, especially with multiple medium velocity burners, promotes good temperature uniformity without the use of high temperature fans. The burners can be adjusted to run lean to provide a slightly reducing atmosphere (although this can not be precisely controlled.) These furnaces are excellent for ceramics processing and most metallurgical work where precise atmosphere control is not required. Systems can be designed with excess air for high uniformity at low temperatures.

FEATURES

ECLIPSE THERMJET VELOCITY BURNERS
The furnace is heated with three or more Thermjet medium or high velocity burners. These typically fire over the load with burner placement balanced to maximize circulation of the combustion products. In some large units they may be configured to fire over and under the load. These are sized for the proper BTU requirements and fuel type of your furnace. In addition the choice of high or medium velocity is an engineering choice dependent on load configuration and furnace size. The burners feature low N OX emissions, integral gas and air orifice plates (for precise gas and air balancing), high velocity for good temperature uniformity in the furnace, and excellent turn down ratio for a wide range of control. The burners are direct ignition which eliminates the need for a bypass pilot.

FM GAS TRAIN
The gas system includes two hydraulic-mechanical shut off valves, manual shut off valve, pressure regulator, and pressure gauges. Each burner has gas and air adjustment and shut off valves. A proportionating valve, controlled by the combustion air, maintains stoichiometric air/gas ratio. Systems can be designed to fire with excess air for high uniformity at low temperatures. (IRI rated gas train is optional.)

COMBUSTION AIR BLOWER SYSTEM
Combustion air is provided by a centrifugal combustion blower. A pressure gauge and air pressure switch monitor performance. Each burner has separate orifice plates and butterfly valves for precise balancing of air flow. The control of firing rate is done with a motorized butterfly valve which controls the amount of combustion air relative to a 4-20mA signal from the temperature control.

ELECTRONIC FLAME SAFETY SYSTEM, SPARK IGNITOR AND PURGE TIMER
Each burner is ignited with a spark plug automatically actuated from the Eclipse Multi-Flame Series 6000 flame safety system. UV (Ultra Violet) sensors monitor each burner. Before ignition the system goes through a timed purge with the combustion air. Safety interlocks include a combustion air pressure switch and gas high/low pressure switch. The Eclipse Multi-Flame 6000 flame monitoring system keeps the operator apprised of the status of the burners. It includes running time along with voltage signal t o each UV sensor. It will alert the operator of any problem with the burners, air flow or gas pressure and will provide "first out" information to actually pinpoint a problem. The operator only needs to press the RESET key to start the burner firing sequence.

HIGH TEMPERATURE UNIFORMITY
The furnace is +/-15F (+/-7C) above 1200F (650C) within the working dimensions. High uniformity at lower temperatures can be achieved with excess air.

EFFICIENT CERAMIC FIBER INSULATION
The sides, back, door and top surfaces are typically insulated with 2300F ceramic fiber modules, 8" thick, 10 LB density, although this is easily modified for different temperature ranges and applications. No asbestos is used. The bottom is insulated with a combination of castable and firebrick. Loads can be directly placed on this strong bottom. Optional castable piers, and ceramic, silicon carbide, serpentine or flat alloy hearth plates are available.

HEAVY DUTY CASE WITH INTEGRAL STAND
The furnace case is constructed of heavy gauge steel with structural stiffeners, lifting rings and leveling bolts. The case is primed with a high temperature (800F) silicone based paint and finished with heat resistant enamel.

COUNTERBALANCED PNEUMATIC VERTICAL DOOR
The standard furnace door has a counterbalanced vertical door with a pneumatic opener and hand or foot operated valve. Double pivoted horizontal doors are optional (standard on 6 and 8 foot high models.)

DIGITAL PID CONTROL SYSTEM WITH HIGH LIMIT
The standard control is a Honeywell UDC 2300 digital PID 3 mode tuning control. A Honeywell UDC 2300 high limit control is also included. All fuses and controls are located in a NEMA 12 panel. The thermocouple is dual Type K with an Inconel protection tube. A limit switch turns down the burners when the door is opened. Control voltage is 120 volts. The furnace is fully fused. Single point power connection.

MEETS NEC, OSHA AND FM CODES
The wiring of the furnace meets the National Electrical Code. The combustion system meets FM standards. IRI standards are available. Furnace meets all OSHA codes in effect at manufacture. Furnace drawings can be submitted to FM or IRI for approval.

FACTORY TESTING, START UP AND INSTRUCTIONS
The furnace is completely tested in our factory up to maximum temperature. A very complete instruction manual is included. A factory technician will start up furnace in your factory and make all adjustments on site.

ONE YEAR WARRANTY
The furnace is warranted for one year.

The XLM furnaces are multi-purpose gas fired box furnaces. They are uniform in temperature and feature accurate digital controls and a single proportionally controlled burner with a 50:1 turn down ratio for accurate control. The burner maintains stoichiometric gas/air ratios. The XLM furnaces reach 2100 º F (1135ºC). Connected gas pressure can be as low as 4" W.C. Electrical requirements are 120 volts, 15 amps. Firing with gas can be more economical than firing with electricity. In addition, the circulation of the hot gases promotes good temperature uniformity without the use of high temperature fans. The burner can be adjusted to run lean to provide a slightly reducing atmosphere (although this can not be precisely controlled.) These furnaces are excellent for ceramics processing and most metallurgical work where precise atmosphere control is not required. They are particularly useful where fumes need to be vented from the furnace, such as in wax burn out work. The single ?package? type burner makes them an economical choice in a small to medium size furnace.

ECLIPSE BURNER WITH 50:1 TURNDOWN RATIO
The furnace is heated with one Eclipse Model 50 MMB Minimatic burner with integral air and gas butterfly valves. The burner is mounted in the furnace with a special 2100F burner block and holder. The blower has an 1/8 H.P. motor. This burner features a 50:1 gas turndown ratio which allows extremely good temperature control over a wide range of temperatures. All piping and controls are included. The gas system includes two solenoid shut offs and manual shut off valve. The control of firing rate is done with a motorized butterfly valve which controls the amount of natural gas and combustion air relative to a 4-20 milliamp signal from the temperature control. A pilot gas train is also included with needle valve for adjustment and solenoid shut off valve. A main gas regulator and main gas shut off valve is included. The burner is located in the back of the furnace at the top of the chamber, firing over the load. The vestibule on the top front of the furnace hangs down so that the flame does not impinge directly on the door. There is one flue at the back top. This location vs. the location of the burner makes the burner flame circulate all the way around the inside of the chamber for maximum efficiency. The burner can deliver up to 500,000 total Btu/Hr with a minimum of 10,000 Btu/hr.

FLAME SAFETY SYSTEM
The burner is ignited with a spark plug actuated from the control panel. The burner includes a UV (Ultra Violet) Sensor and electronic flame safety. Before ignition the system goes through a timed purge with the combustion air. A combustion air pressure switch and high/low pressure switch are included. Safety interlocks and purge condition are annunciated on the control panel.

HIGH TEMPERATURE UNIFORMITY
The furnace is uniform to within +/ 25F (+/-12C) above 1200F (650C) within the working dimensions.

EFFICIENT CERAMIC FIBER INSULATION
The sides, back, door and top surfaces are insulated with 2300F ceramic fiber modules, 6" thick, 10 LB density. No asbestos is used.

STRONG CASTABLE REFRACTORY BOTTOM
The bottom is insulated with 6" of lightweight, strong and highly insulating 2200F castable. Loads can be directly placed on this strong bottom. Optional castable piers, and ceramic, silicon carbide, serpentine or flat alloy hearth plates are available.

HEAVY DUTY CASE WITH INTEGRAL STAND
The furnace case is constructed of 10 gauge steel with structural stiffeners, lifting rings and leveling bolts. The case is primed with a high temperature (800F) silicone based paint and finished with heat resistant enamel.

DOUBLE PIVOTED HORIZONTAL DOOR
The standard furnace door has two pivots which allow it to open like a parallelogram. This keeps the hot face of the door away from the operator. A door vestibule made of ceramic fiber board surrounds the door perimeter. The top vestibule drops down 6" from the top to prevent the burner flame from impinging directly on the door.

DIGITAL PID CONTROL SYSTEM WITH HIGH LIMIT
The standard control is a Honeywell UDC 2300 digital PID 3 mode tuning control. A Honeywell UDC 2300 high limit control is also included. All fuses and controls are located in a NEMA 12 panel. The thermocouple is dual Type K with an Inconel protection tube. Thermocouple break protection is included. Limit switches shut off burner if the door is opened. All voltage is 120 volts. The furnace is fully fused. Single point power connection.

MEETS NEC, OSHA AND FM CODES
The wiring of the furnace meets the National Electrical Code. The combustion system meets FM standards. IRI standards can be quoted as an option. Furnace meets all OSHA codes in effect at manufacture. Furnace drawings can be submitted to FM or IRI for approval.

FACTORY TESTING AND INSTRUCTIONS
The furnace is completely tested in our factory up to maximum temperature. A very complete instruction manual is included with the furnace.

ONE YEAR WARRANTY
The furnace is warranted for one year.

Vertical Vacuum Furnace 4" dia. by 4" high hot zone

• Table top unit
• Metal/Ceramic or graphite hot zones
• Same high quality as our production systems
• Fully assembled
• Ready to run
• Plugs in to 240 volt single phase
• Many options

Specifications

• Work zone: 4" dia by 4" high, top load.
  100 mm dia by 100mm high
  

• Hot zone materials: Molybdenum rod element, ceramic insulation
  Graphite element and insulation
  

• Maximum temperature: Metal/ceramic - 1400°C (2550 F)
  Graphite - 2200°C (4000°F)
  

• Vacuum Pump: 5 CFM, two stage, vacuum to 20 microns,
  Manual vacuum valve, air release valve
  Convectron vacuum gauge with setpoint
  

• Gas backfill: Flowmeter, manual valve, pressure switch
  Overpressure relief at 3 psig
  

• Thermocouple: Type C two each for control and overtemp
  

• Controls: Programmer, 9 programs
  Overtemperature meter
  Indicating lights and switches
  

• Power: 4 kW low voltage power supply
  

• Chamber: All stainless steel, water cooled
  Aluminum top cover with clamps
  

• Sight ports: 1" quartz
  Movable shutter
  Blanked off port
  

• Electrical service: 240 Volts, 30 amps, 60 Hz, 1 phase
  10' Electrical cord with plug
  

• Cooling water: 1 gpm for high temperature and long runs
  

• Size Chamber: 12" dia by 20" high, 60 lb
  

• Base: Mounted on Base Plate, 48" long x 32" wide, 150 lbs.
  To sit on customers table
  

• Warranty: One year except consumables
  

• Terms: FOB Ayer, MA : 50% With Order, 50% Upon Shipment
  Export: Letter of Credit Required, add $950

Command Centers® are complete spa-side control packages designed for durability and user convenience in both new installations and replacement applications. They are available with two, three and four transmitter button configurations, and are equipped with a remote sensing thermostat, power cord, equipment status indicating lights and optional digital temperature readout.

The Command Centers® utilize an electronic thermostat designed, developed and manufactured by Tecmark® in our Mentor, Ohio facility. These units feature a thermistor/bulb assembly for remote temperature sensing. All thermostats are calibrated to open on temperature rise at the UL/CSA maximum allowable set point with the shaft at the high stop position and are intended for pilot duty control of heater contactors. Standard thermistor cable length is 60" (1.5m) with a 5/16" (8mm) OD bulb for thermowell installation.

Tecmark® Command Center® technology incorporates a unique, tactile thermostat adjustment knob with each notch equal to approximately 1° F (.56°C) temperature The Command Centers® feature high volume, miniature air transmitters for operation single function or four function switching controls. The faceplate design allows serviceability of individual transmitters without having to replace the entire unit. design conserves space and it is easily retrofittable to existing applications.

Typical Applications

The Command Center® is primarily used at the spa-side to regulate the water temperature, and to control, via the air transmitter buttons, a variety of electrical devices including motors, lights, pumps, air blowers, and other associated equipment.

Basic Construction

• One piece faceplate/housing construction utilizes durable thermoplastic materials
• Tactile thermostat adjustment knob
• Multicolor LED equipment status indicators
• Factory installed double-sided foam mounting gasket
• Electrical connections via 18/5 SJTW-SJTW-A water resistant cord with 5-pin plug
• Pressure connections accept 1/8" (3mm) or 1/16" (1.5mm) I.D. tubing
• 60" (1.5m) thermistor cable with 5/16" (8mm) O.D. bulb
• Allows serviceability of transmitters without replacing the entire unit
• Conforms to UL and CSA standards under UL file E110332; low 12 volt safety control voltage acceptable worldwide (electronics comply with CE regulation)

Available Features

• 12, 120 OR 240 VAC, 50/60 Hz (factory set)
• Digital display factory set to display water temperature in degrees F or degrees C. Temperature will flash intermittently at temperatures above 109° F (43° C)
• Two, three and four air transmitter configurations available with faceplate size equal to the previous two-button faceplate
• Optional retrofit plate available for existing three and four button installations.
• Optional thermistor cable lengths
• Power cords in 6' (1.8 m), 10' (3.0 m) and 25" (7.6 m) lengths
• Units may be individually carton packaged or bulk packed
• Custom labeling, produced from your own camera-ready artwork or created with the help of Tecmark's design staff, is available to satisfy specific needs

Ratings and Specifications

• Input voltage: 12, 120 or 240 VAC, 50/60 Hz (factory set)
• Field-tested critical components specifically selected to operate reliably in temperature extremes of 32° F (0° C) -140° F (60° C)
• 100,000+ cycle life under full mechanical, electrical and thermal loads.
• Electrical rating allows pilot duty control of heater contactors
• Thermostat contacts are designed to open on temperature rise at the UL/CSA maximum allowable setpoint with the adjustment shaft rotated to the full clockwise position
• Switching differential: Approximately 1° F (.56° C)
• 100,000+ cycle life under full mechanical, electrical and thermal loads

Design Flexibility

Tecmark's manufacturing philosophy is unique. In an effort to provide you with a product that is most suited to your application, the Command Center® models incorporate numerous interchangeable components for the ultimate in design flexibility. This means a product tailored to your needs without the high price and long lead times associated with custom manufacturing. If you have a need and don't see the features you require, please ask us!

Download the PDF for this product >>>

The Vacuum Research Diaphragm Manometers are compact vacuum measurement and control instruments that are unaffected by gas composition. The sensors have 316 L stainless steel diaphragms and any sensor can measure liquid or gas pressure as well as vacuum.

• View Detailed Datasheet

Response time is less than 400 milliseconds for full scale and sensors are available with a variety of flanges including VCR and KF or NW styles. With any sensor, these instruments offer the precision and high resolution of digital electronics at the same price as analog instruments. Both indicator and controllers are provided in 1/4 DIN enclosures.

The Dual Set Point Controller operates two control relays. Set point values are adjusted from the front panel and displayed on the meter. Push-to-set switches simplify display of the set point pressures. Relays have 3 Amp contacts, SPDT, and have screw terminal connectors on the rear of the instruments.

Features:

• 0.5 to 1200.0 Torr Range; ± 0.1 Torr Resolution
• Available 0.5 to 1600.0 mbar & 0.1 to 160.00 kPa
• 316 S.S. Diaphragm Measures Gas Or Liquid
• Dual Set Point Controller With 2 Relays
• Easy To Use; No Keyboards or Scrolling Menus
• Linear 0 to 10 VDC Output; 4-20 mA Optional
• Fast Response; Less Than 400 mSec. Full Scale

Specifications:

• Pressure Range: 0.5 to 1200 Torr; ± 0.1 Torr
• Resolution: ± 0.1 Torr over entire range.
• Display: 4 1/2 digit red LED; characters .47 in. (12 mm) high.
• Calibration: Any gas, liquid or vacuum compatible with sensor materials.
• Accuracy: 1% of reading or 1 Torr.
• Response Time: Less than 400 msec. for response to a step change.
• Linearity: ± 0.15% Full Scale. Sensitivity: ± 0.1 Torr
• Analog Output: 0 to 10 Volt DC into 2000 Ohm load or higher. 2 pin connector included. 4 to 20 mA output in addition to 0 to 10 Volt D.C. available.
• Sensor: See "ordering Information" below for list of sensor heads.
• Materials: All parts in contact with process are 316 L Stainless Steel.
• Set Point Range: Full Scale, 0.5 to 1200 Torr. Repeatability: ± 1 Torr.
• Relays: Controller model includes 2 relays; SPDT contacts rated 3A @ up to 220 VAC non-inductive.
• Sensor Internal Volume: 1.25 ml for stainless steel sensor.
• Line Power: 115 VAC, 50/60 Hz; 230 VAC or 24 VDC optional at no additional cost.
• Wattage: Less than 1 Watt for indicator; 2 Watts for controller.
• Line Regulation: ± 20% change in line voltage produces less than 1% change in reading.
• Temperature Effects: When changes occur in ambient temperature between 0 oC and 50 oC, reading will change no more than ±0.02% per oC.
• Bakeout Temperature: Sensor can be baked to 100 oC (212 oF) in air or vacuum.
• Dimensions: 1/4 DIN enclosure. See drawing on page 44.
• Mounting: Panel mounting hardware is standard. Bench mount and portable cabinets are also available, see page 43.
• Sensor Cables: 10 ft. (3m) attached.
• Extension Cables: Change sensor cable length without recalibration. Extensions to 250 ft. (75 m) can be used. See page 42.
• Line Cord: 3 wire, 65 inch (170 cm) attached.
• Net Weight: Indicator 1 lb., 2 oz. (0.5 kg); Controller 1 lb., 6 oz. (0.6 kg)
• Shipping Wt.: Indicator 2 lbs., 8 oz. (1.1 kg); Controller: 3 lbs. (1.3 kg)

Please click on the links to the right for more information, request a quote or contact Vacuum Research today!

Proven Technology Guided Wave has been measuring hydrogen peroxide vapor concentrations for several years using our near infrared (NIR), fiber optic scanning spectrophotometers. Once the specific wavelengths for H2O2 and H2O were determined, a simpler, non-scanning analyzer could be developed for this application. This new design uses fixed wavelength technology but still incorporates dual beam design for stability and accuracy. Fiber optic cables take the light to the isolation chamber and back to the analyzer, the virtual equivalent of vapor sampling. This monitor measures to within 0.1 mg/l of H2O2.

Easy Operation and Control The monitor is controlled via the touch pad or through the RS232 communications port with simple to use operational commands. Password protection allows for two different levels of access: operator and administrator. All of the analytical calculations are encoded in the firmware -- there is no advanced or field programming required.

Quick Installation and Start-up The system is packaged with everything needed to start monitoring. Included are: the analyzer, the probe, a pair of fiber optic cables to connect the probe to the analyzer, a comprehensive operations manual, power cable and even a communications cable to connect to your PC. There are no extras to buy; you just unpack, plug it in, warm it up, install the probe, and start to monitor. There is virtually no start-up learning curve.

Factory Calibrated Normally, spectrophotometers are calibrated by comparing the spectral results against an accepted wet chemical method. This analyzer was calibrated by comparing concentration readings versus theoretical calculations and two wet chemical methods commonly used to measure H2O2 vapor concentrations (Pharmaceutical Engineering, July/August 1998, Vol. 18 No. 4). Once the chemical and physical constants were determined and encoded into the firmware, the only way the analyzer could fall out of 'calibration' is if the photometric properties of the instrument change.

Failsafe Operation Every time a reference is taken prior to the sterilization cycle, the monitor checks itself to ensure that these photometric properties have not varied from factory specifications. Each instrument contains a validation filter, made of a polymeric material chosen because of its insensitivity to moisture and temperature conditions. The filter also has unique spectral characteristics at the wavelengths used to measure hydrogen peroxide and water. The spectrum of H2O2 and H2O do not change. Every time the monitor is instructed to take a reference, the validation filter is temporarily moved into the light path and the optical characteristics of the analyzer are checked. If the monitor fails any of the diagnostic checks, or does not meet factory specifications, it will give an error message and will not allow itself to continue. This same filter is available as a manual probe insert, testing the external (fibers and probe) components of the system, providing data via the RS232 port or touchscreen.

SPECIFICATIONS H2O2 vapor measurement range 0.1 - 50.0 mg/l [71.2 – 35,600 ppm V/V]

H2O2 measurement accuracy ± 0.1 mg/l

H2O vapor measurement range 1.0 mg/l – to condensation [>1345 ppm V/V]

H2O measurement accuracy (relative to concentratin at time of reference) ± 0.2 mg/l

Wavelength accuracy ±1.0 nm

Bandwidth 6.0 ± 1.0 nm

Operating Environment: Ambient temperature: 10 – 35 °C Optimal ambient temperature stability: < ±2 °C Relative humidity: 0 – 95% non-condensing

Monitor Dimensions: Height: 29.2 cm (11.5") Width: 50.8 cm (20.0") Depth: 33.5 cm (13.2") Weight: 12 kg (25 lb)

Probe Specifications: 32.0 cm length (12.6") x 4.7 cm diameter (1.85") 25.0 cm pathlength Temperature and pressure range: 0 °C to 90 °C and suitable for use in 10-3 Torr Fabricated parts are electropolished 316SS

Fiber Cable: 6 m fiber length of Ultra Low -OH fiber with SS SMA connector on probe end and FC connector on monitor end. PVC jacketed fiber cable

Electrical and Communications Connections: Analog outputs: (37 pin D type) separate 0-l0 Vdc outputs for H2O2 and H2O: paralleled with a corre¬sponding 4-20 mA current signal

Serial input/output: RS232, 9 pin male; transmitting H2O2 and H2O concentrations, date, time, and serial number

Included as Standard: Monitor Probe Terminated fiber cable pair, each 6 meters long P ower cord Communications cable (9 pin female to 9 pin female) Extra tungsten halogen bulb - 6 watts Fuses and SMA wrench Complete operations manual Power Supply: universal switching, 50/60 Hz, 120 or 220 Vac

Options: Additional terminated fiber cable, 6 meters long Additional probes, custom probes External validation filter 50 cm single sided G-SST probe Custom length fiber cable (max 20 meter distance, probe to monitor Annual factory calibration service

User Programmable Features: Password protection: 2 level, Operator and Administrator Sampling time: 10 - 30 seconds Reporting units: mg/l or ppm Control source: built in keypad or RS232 communications port Analog output scaling: 0 – 10 volts