ROTARYTORQUESENSOR.COM / CONTACTLESS MEASUREMENTCompare low and high torque ranges for motor efficiency mapping. Review switching, timing, uncertainty and shaft fit. Send your dual-range configuration request.
Request engineering review ↗MT-RTR-DR / 0.5/5–2,000/20,000 Nm pair requests
Request separately calibrated high and low torque ranges. Confirm whether the proposed design switches ranges or provides independent simultaneous channels.
Reference review: Burster 8661 dual-range · KTR DATAFLEX · Lorenz / Interface review. Independent alternatives require mechanical, electrical and calibration acceptance.
CAPACITY / SPEED / GEOMETRY / MEASUREMENT CHAIN
Program envelopes below are planning inputs. An approved drawing must pair the actual capacity with shaft/pilot geometry, maximum RPM, stiffness, inertia and calibration limits.
| Program / model status | Requested torque: Nm / in-lb | Dual-range request | RPM planning envelope | Shaft / key / flange interface | Stiffness & rotating inertia | Output / encoder requests | Drawing / STEP / quote |
|---|---|---|---|---|---|---|---|
| MT-RTR-DRConfiguration program; released SKU pending approval | 0.5/5–2,000/20,000 Nm pair requestsEach requested range needs its own in-lb scale | 1:5 / 1:10 pair review | 15,000 RPM requested | Shaft / bearingless flange · range-pair reviewØ, fits, keys, center height or pilot/BCD from approved drawing | Required with the range-specific drawingNm/rad + kg·m² (or kg·cm², with units) | Analog / frequency / RS485 / RS422 / CAN360 / 1024 / 2000 PPR requests; confirm A/B and receiver rate | Request STEP & quote ↗ |
1 kg·cm² = 10⁻⁴ kg·m². No stiffness, inertia, shaft diameter or certified speed is inferred from a family name or photograph. Define the calibration evidence.
Configuration targets include 24 V DC supply, active ±5 V / ±10 V / 0–10 V / 4–20 mA torque, TTL speed, RS485 Modbus RTU or CAN. Confirm the actual interface, update rate and pinout on the quoted model.
Requested accuracy options are ±0.1% FS and ±0.05% FS. Ask for separate nonlinearity, hysteresis, repeatability and temperature terms, plus calibration uncertainty. A full-scale error becomes a larger percentage of a small measured torque.
Plan the alignment and coupling arrangement ↗Engineering method reviewed . Configuration-specific data are confirmed with your drawing review.
MT-RTR-DR / TWO CALIBRATED SCALES
Illustrative calculation: ±0.1% FS on a 200 Nm range is ±0.2 Nm from that term alone. At 2 Nm this equals ±10% of reading. The same FS term on a 20 Nm range is ±0.02 Nm, or ±1% of a 2 Nm reading.
These are arithmetic examples, not MT-RTR test results or complete measurement uncertainties. Temperature, hysteresis, mounting, sampling and DAQ effects must also be included.
A switched-range instrument needs range-state and switching-delay handling. Independent simultaneous channels require verified time alignment, cross-talk, channel bandwidth and overload behavior. Specify which arrangement the test needs.
Request 1:5 or 1:10 range pairs, the minimum working torque and the peak duty. Both scales need documented calibration and protection when the low range is exceeded.
| Requested pair | Planning purpose | Approval required |
|---|---|---|
| 5 / 0.5 Nm | Micro-motor drag versus loaded torque | Noise, low-range uncertainty and actual shaft geometry |
| 200 / 20 Nm | Efficiency mapping and starting/continuous duty | Both ranges, RPM, switching or channel synchronization |
| 2000 / 200 Nm | Gearbox or hydraulic drive loss | Peak transients, inertia, combined loading and calibration |
Example range-pair requests only; availability and performance require supplier approval. Source context: Burster 8661 manual, dual-range section.
APPLICATION-SPECIFIC MEASUREMENT BOUNDARIES
Review peak/low-load ranges and synchronized mechanical/electrical power.
Open ev motor dynamometers review ↗Separate pump-shaft input from hydraulic output and upstream electrical losses.
Open rotodynamic pump efficiency review ↗Resolve the small loss between two time-aligned torque-and-speed measurement chains.
Open gearbox efficiency and loss review ↗INTERACTIVE DYNO POWER PLANNING
P[kW] = T[Nm] × n[RPM] / 9549.2966. Mechanical hp uses 745.6999 W/hp; it is not metric PS. Signed inputs follow your shaft convention; capacity uses the magnitude.
The multiplier is your preliminary sizing allowance. It does not establish dynamic overload, fatigue or shaft-train safety limits. Those require the selected sensor and coupling data.
NIST horsepower conversion reference ↗Candidate families below require configuration-specific speed and load approval.
MECHANICAL + PINOUT CUSTOMIZATION REVIEW
Send both shaft diameters, metric/inch fits, keys, engagement, center height, foot-hole spacing, axial envelope and the original drawing revision. Flange requests also need pilot, bolt circle and fastener definition.
Send the connector part number and mating-face pin drawing. Compare supply/current, torque scale and polarity, encoder A/B, reference ground, shield and any shunt trigger. A common 12-pin shell does not establish interchangeable wiring.
Review torque/RPM, inertia, stiffness, parasitic loads, bandwidth and calibration before a mounting trial. Confirm each accepted change in the quotation and drawing.
Customization is assessed from supplied drawings. No universal pin-to-pin or mechanical interchange is promised.
REQUEST THE RECORD, NOT ONLY AN ACCURACY NUMBER
Request loading/unloading points, zero return, nonlinearity, hysteresis and uncertainty for the sensor/cable/readout combination. Dual-range systems need separate records and scaling for both ranges.
Calibration scope and blank request worksheet ↗State inverter type, switching conditions, cable length, grounding scheme and required test method. Ask for the applicable report and its exact tested configuration.
Review VFD / SiC signal integration ↗No MT-RTR calibration certificate or EMC test report has been supplied for public display. These are document requests; no accreditation or certification badge is implied.
BRUSHLESS / NON-CONTACT SIGNAL TRANSFER
Inductive power and telemetry carry the torque signal across the rotating interface. The shaft rotates continuously; the connector and signal cable remain stationary.
Contactless transmission removes brush wear at that interface. Inspect support bearings, couplings, alignment and fasteners as specified.
Review rotor geometry, capacity, balance and the full shaft train. The bearingless family targets up to 18,000 RPM on selected configurations.
Request active analog or digital outputs for the PLC or DAQ. Confirm 24 V supply, bandwidth, output scaling, cable and protocol compatibility.
| Decision | Contactless telemetry | Brush / slip-ring transfer |
|---|---|---|
| Rotating signal interface | Inductive / telemetry link, no brush contact | Physical sliding contact |
| Wear review | Shaft support and mechanical assembly remain relevant | Include brush/contact inspection for that design |
| Speed & service interval | Use the model-specific specification | Use the model-specific specification |
Modern FUTEK, HBM, Magtrol and Burster models also use non-contact designs. This is a technology explanation, not a claim that those brands use brushes.
DRAWING / PINOUT / CALIBRATION REVIEW
We review the torque/speed duty, mechanical fit and signal chain before proposing a configuration.
Your reply should identify the candidate sensor, coupling bores, drawing/STEP availability, pinout, calibration scope and itemized quotation.
The email link carries the same entries and package options. Your email application opens a draft; send it there to deliver the request. Please share non-confidential specifications first.
Drawings, measured ratings and report availability are confirmed for the selected configuration. Please state your required delivery date and country.
Optional, for up to eight hours since your last edit. Contact details, company, country, quantity, application and original-model reference are excluded. Product pages apply their own series.
Save a text brief for internal engineering review before sending. Downloading does not submit the request.
Still to provide before sending: Full name; Work email; Delivery country; Target torque and units; Project quantity; Application and duty; Maximum operating RPM; Both torque ranges.
This file includes your entries. Share only with intended recipients.
RotaryTorqueSensor.com | Engineering requirement brief DRAFT REQUEST — not submitted This records requested requirements, not a quotation, released specification or calibration certificate. Rotary torque sensor engineering request Full name: [your name] Work email: [your work email] Company: [optional] Delivery country: [country] Series: MT-RTR-DR Mechanical interface: Confirm from original drawing Target torque: [Nm or in-lb] Maximum operating RPM: [RPM] Dual-range pair: [if required] Motor / load shafts: [diameters, fits, keys] Signal: ±10 V Encoder PPR: 360 Bundle: Sensor + matched coupling pair Selected options: Integrated speed encoder: 360 / 1024 PPR (+$65 budget; 2000 PPR quoted separately) | Matched diaphragm / bellows coupling pair, custom bores (+$140 budget) | Dual-range configuration review (+$180 budget) Original model / drawing: [replacement requests] Quantity: [quantity] Application: [duty, peaks, bandwidth, environment, target delivery] Source page: /dual-range-rotary-torque-sensors/ Please review configuration, approved drawing / STEP availability, wiring, calibration scope and quotation. ENGINEERING REPLY CHECKLIST - Confirm the combined torque/speed envelope, peaks and required bandwidth. - Supply the capacity-specific approved 2D/STEP and mating-shaft review. - Confirm connector pinout, supply, torque output and encoder/PPR. - Identify actual calibration scope, uncertainty and report availability. - Itemize sensor, couplings and accessories; confirm price and delivery. - Confirm dual-range switching or simultaneous channels when requested. Reply to [email protected] with the request reference when available. Share this file only with intended recipients; it contains the entries you supplied.