Welcome to Kett - Tomorrow's Testing Today
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Welcome to Kett - Tomorrow's Testing Today
Online NIR Moisture Sensor: Smart Head Design, Runs With or Without a PC
The measurement head at the center of Kett’s production line moisture systems. All calibration and calculation happens inside the head, so it reads on its own LED at the line and reports to a control system without a PC in the loop.
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Most online sensors are only half an instrument. The calibration lives in a controller, the math happens somewhere else, and losing the connection means losing the reading. The KJT330 puts the processor, the calibrations, and the display inside the head itself, so a single unit mounted over the line is a complete measurement point.
The head measures from 350 mm above the surface across a 50 mm spot, so nothing contacts the product and nothing interrupts the run. Response is approximately two seconds with a selectable averaging constant. The aluminum casting is dust proof and drip proof, the air purge hood keeps the optical window clear on about five liters per minute of dry air, and the tungsten lamp and filter motor are both rated at 20,000 hours. It can run standalone driving a control system directly, or connect to a processor unit and PC for calibration, trending, and data collection in Kett Tracker.
Each unit shipped with Kett’s One Year Total Care Warranty covering parts, labor, and specification compliance. Maintenance Agreements are available.
The KJT330 is no longer manufactured. It succeeded the KJT300SH sensor, and it was also offered as the KJT330SH for high moisture applications.
Need online moisture measurement on your line today? The KJT703 Instant Online Moisture Meter is the current online moisture system, carrying the same non contact measurement in a supported platform.
| Weight | 35 lbs |
|---|---|
| Dimensions | 22 × 18 × 12 in |
| Measurement Principle | Near-Infrared Reflectance |
| Measurement Range | 0.000–99% (product dependent) |
| Accuracy | ±0.001% (reference method dependent) |
| Resolution | 0.001% |
| Reproducibility | 0.001% |
| Response Time | Approximately 2 seconds, analog output. Averaging time constant selectable 0–99 seconds. |
| Refresh Rate | 0.2 seconds per output, 0.5 seconds per display update |
| Applications | Moisture |
| Measurable Components | Moisture |
| Form Factor | Online |
| Measurement Diameter | Approximately ø50 mm |
| Measurement Distance | 350 mm ±50 mm |
| Number of Wavelengths | 1 plus reference |
| Light Source | Tungsten lamp |
| Sensor Type | Reflectance sensor head with lead sulfide detector in an aluminum casting, dust proof and drip proof, with air purge hood |
| Display | Red seven segment LED on the sensor head showing moisture content, absorbance, channel number, and sensor number |
| Measurement Modes | Continuous monitoring with selectable averaging, channel selection by keypad or external contact input |
| Compensation Functions | Temperature compensation, humidity compensation via the sensor integrated in the air purge hood, and analytical curve offset compensation |
| Features | Zero adjustment, analytical curve offset correction, upper and lower moisture alarms, self diagnostics, error code reporting |
| Data Memory Capacity | 99 analytical curves stored in the sensor head. Trend and process data stored in Kett Tracker on the connected PC. |
| Calibration Curves Available | Up to 99 per sensor head, built by regression against user reference values using linear, quadratic, or cubic fit |
| Safety Features | Sensor head high and low temperature alarms, motor rotation error, low reflectance error, calculation and memory error reporting |
| Operating Temperature | 0–40°C at the installation site |
| Operating Humidity | 10–80% RH, non-condensing |
| Communications | RS-422 to the processor unit, standard. Alarm output standard. RS-232C to PC and 4–20 mA recorder output available as factory options. |
| Power | 100–120 VAC or 200–240 VAC, 50/60 Hz, selected at time of shipment |
| Power Consumption | 52 VA |
| Dimensions | 291 × 150 × 192 mm (W × D × H), 440 mm overall including the air purge snout |
| Weight | 7.5 kg (16.5 lbs) including the 1 kg air purge hood |
| Standard Accessories | Air purge hood with integrated humidity compensation sensor, standard moisture zero adjustment plate, 10 m head to processor cable, power cord |
| Options | Factory fitted 4–20 mA recorder output, factory fitted RS-232C output, purge enclosure, cooling systems, junction boxes for multiple head installations, traverse and scanning frame |
| Warranty | One Year Total Care Warranty covering parts, labor, and specification compliance. Maintenance Agreements available. |
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