TECO HK Microwave
The TECO HK Series microwave consistency transmitters offer a versatile, safe, and cost-effective solution for measuring the consistency of paper stock, including broke, recycled, or other challenging fiber types. The system is unaffected by variations in fiber length, freeness, flow rate, or wood species.
Product Summary
Download Product Summary SheetAt typically less than half the cost of other microwave transmitters, the HK Series can measure both the percentage of total solids in water-based additives and the moisture content in wood chips—using the same transmitter.
Each HK unit consists of a transmitter and an antenna body. Depending on the model, these can be configured as a single integrated unit or with a remotely mounted transmitter—ideal for harsh or high-vibration environments. The antenna body is available in fixed or adjustable configurations, allowing operators to optimize sensitivity based on process conditions. A non-intrusive configuration is also available.
Features & Benefits
- High Accuracy – 0.1% or better
- Low cost – typically less than half the cost of other microwave transmitter
- Easy to install
- One point calibration
- Optional adjustable antenna units to maximize sensitivity to process conditions. Optional non-intrusive configuration
- Internally compensated for temperature
- No routine maintenance required. Install & forget
- Current and Digital Outputs. Contact closure
- Versatile – Same transmitter can be used in pipes, tanks, chests, belts & chutes
Applications
Designed for broad application flexibility, the HK Series can be installed in process pipes, tanks, chests, or even positioned to measure stock on conveyors and chutes. Each unit includes a Pt RTD for temperature compensation and can be optionally equipped with a display for local or remote monitoring.
Measurement of Pulp Stock Consistency
The TECO HK-1 Series Microwave consistency transmitter was installed on an 8 inch vertical pipe. The insertion sensors were installed using a stainless steel flange. An RTD was also installed for temperature compensation. The TECO HK-1 system was installed side by side with a Kijanni microwave transmitter.
As is seen in the graph below, there is a high degree of correlation between the Kijanni microwave instrument and the TECO HK-1 microwave unit.
Measurement of Percent Total Solids of Gypsum in Water
The TECO HK-1 Series Microwave consistency transmitter was installed on an 8 inch horizontal pipe. For easy installation, the insertion sensors were installed directly on the pipe using threaded half couplings. An RTD was also installed for temperature compensation.
Process samples were collected over a one month period. Each sample was submitted for lab analysis, and, at the same time, readings of the process by the TECO HK Series microwave unit were recorded. Lab samples were evaluated by drying, and percent total solids compared to the readings recorded from the TECO HK Series microwave unit.
As is seen in the graph below, there is a high degree of correlation between the lab values for % Total Solids and the readings of the TECO HK Series microwave unit.
Specifications
Download Spec Sheet| Accuracy | ± 0.1% consistency or better |
|---|---|
| Range | 0.5% and up. As low as 0.25% under certain conditions |
| Display | 2x24 character LCD, LED Backlit; dialog with pushbuttons and alphanumeric display |
| Power | 115/230V, 47-65Hz, 50VA consumption |
| Housing | IP65, NEMA 4 (Aluminum) |
| Weight | 11 pounds |
| Dimensions | 9”x7.9”x4.3” |
| Analog Output | Two 0/4-20ma active, isolated outputs. 500 ohm max resistance |
| Analog Input | One 0/4-20ma non-isolated input, 125 Ohm max load. |
| Communications | Two Com ports, RS232, Optionally RS485. |
| Relay | One 250VAC, 30VDC, 1A contact |
| Microwave | -80dBm, 1nW |
| Operating Temp | -20° to 85° C |
| Sensor Operating Temp | -30°-170°C (Optionally 250° C) |
| Storage Temp | -30° to 95° C |
| CE Mark | Yes |
| Noise Immunity | IEC 801 part 1-5 |
| Radiation | EN55011 Teil B |
| Instrument Safety | IEC 1010-1 |