Derivative Action in PID Control Without Noise Problems
Learn what derivative action contributes to a PID loop, why it can amplify measurement noise and setpoint changes, and how filtering, sampling, and staged tests make D tuning safer.
Manufacturer: Bently Nevada
Product No.: 991-06-70-01-00
Country of origin:United States
Product Type: Thrust Transmitter
Payment: T/T, Western Union
Weight: 430g
Dimensions: 53.3 mm x 73.9 mm x 100.1 mm
Shipping port: Xiamen
Warranty: 12 months
The 991 Thrust Transmitter provides continuous axial shaft position monitoring for rotating machinery protection systems. The transmitter converts proximity probe displacement signals into a proportional 4 to 20 mA output suitable for PLC, DCS, and machinery monitoring applications.
The Bently Nevada 991-06-70-01-00 is configured for a 0.6 mm full-scale measurement range and a 7.0 m transducer system length. The unit supports direct integration with compatible proximity probe systems for thrust position measurement on compressors, pumps, motors, and other critical rotating equipment.
The transmitter combines signal conditioning and current loop transmission within a compact housing. DIN-rail mounting clips simplify cabinet installation in industrial control panels and OEM machinery skids.
Diagnostic signal access supports maintenance verification and machinery condition analysis during operation. The design is suitable for installations requiring continuous thrust monitoring with standard analog control system interfaces.
| Code | Description |
|---|---|
| 991 | Thrust Transmitter |
| 06 | 0.6 mm full-scale range |
| 70 | 7.0 metres (23.0 feet) system length |
| 01 | 35 mm DIN-rail clips |
| 00 | Not required agency approval |
| Category | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Product Type | Thrust Transmitter |
| Model | 991-06-70-01-00 |
| Series | 991 |
| Country of Origin | Made in U.S.A |
| Full Scale Option | 0.6 mm |
| System Length | 7.0 metres (23.0 feet) |
| Mounting Option | 35 mm DIN-rail clips |
| Agency Approval | Not required |
| Weight | 0.43 kg |
| Dimensions (H x W x D) | 53.3 mm x 73.9 mm x 100.1 mm |
| Body Height (without DIN clip) | 42.6 mm |
| Mounting Hole Distance (Width x Length) | 63.5 mm x 69.9 mm |
| Mounting Hole Diameter | 5.8 mm |
| Output Signal | 4 to 20 mA |
| Mounting Method | DIN rail mounting |
Install the transmitter on a standard 35 mm DIN rail inside a grounded industrial enclosure. Maintain adequate spacing between signal wiring and high-voltage power cables to reduce electrical interference.
Use shielded transducer cables and connect shields according to plant grounding practices. Avoid routing probe cables near motor starters, VFD output wiring, or switching power supplies.
Verify proper probe gap adjustment before system commissioning. Incorrect mechanical positioning may affect transmitter scaling and thrust measurement accuracy.
Ensure sufficient ventilation inside the control cabinet when the transmitter operates in elevated ambient temperatures.
Inspect DIN-rail retention clips after installation to confirm secure mechanical mounting in high-vibration environments.
What does the transmitter measure?
It measures axial shaft displacement for thrust position monitoring.
What output signal does the unit provide?
The transmitter provides a 4 to 20 mA analog output.
What is the configured measurement range?
This version uses a 0.6 mm full-scale range.
Which mounting method is included?
The unit includes 35 mm DIN-rail mounting clips.
What is the system cable length?
The configured system length is 7.0 metres.
Can the transmitter connect to a PLC analog input?
Yes. The 4 to 20 mA output is suitable for standard PLC and DCS analog input channels.
Is the transmitter suitable for compressor monitoring?
Yes. It is commonly used on compressors and other rotating machinery.
Does the housing support panel installation?
Yes. The compact housing supports industrial control cabinet installation.
What type of machinery commonly uses this device?
Pumps, motors, compressors, and turbines commonly use thrust transmitters.
Is external signal conditioning required?
No. Signal conditioning is integrated within the transmitter.
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| Color pattern |
White
|
| Country of origin |
United States
|