Inline Threaded Load Cells
TCM Series compression and tension load cells. 2,000–10,000 lbf capacity with ±0.25% full-scale accuracy. Stainless steel. Direct threaded mount. Ships from Buffalo Grove, IL.
Quick Facts
- Three series: TCM325 (2,000–3,000 lbf), TCM350 (4,000–5,000 lbf), TCM375 (7,500–10,000 lbf)
- Stainless steel body. Bidirectional (tension + compression).
- Nonlinearity ±0.25% FS. Hysteresis ±0.25% FS. Repeatability ±0.05% FS.
- 10V rated excitation. 10 ft cable standard. Metric threads available (M10, M12, M16).
- Drop-in replacement for Futek FSH04006, FSH04009, FSH04078, FSH04081, FSH04082.
Core Specifications
TCM Series Selection
The TCM inline threaded series spans three load ranges with metric and imperial thread options. Each model operates bidirectionally and carries identical accuracy specifications.
| Model | Imperial Threads | Metric Threads | Capacity (lbf) | Output Impedance | Price |
|---|---|---|---|---|---|
| TCM325 | 3/8-24 UNF | M10×1.5 | 2,000–3,000 | 350±5 Ω | $500 |
| TCM350 | 1/2-20 UNF | M12×1.75 | 4,000–5,000 | 350±5 Ω | $500 |
| TCM375 | 3/4-16 UNF | M16×2 | 7,500–10,000 | 350±5 Ω | $550 |
All models ship with 10 ft (3 m) 4-conductor 28 AWG shielded cable. Specify thread type (imperial or metric) at order.
How Inline Threaded Load Cells Work
Inline threaded load cells measure force by converting mechanical load into electrical impedance change. The TCM series uses a strain gauge bridge transducer mounted inside a stainless steel body. Threads on the top and bottom allow direct insertion into load paths without brackets or adapters.
Force Measurement Principle
When tension or compression is applied, the stainless steel body elastically deforms. Strain gauges bonded to the load cell detect this deformation and produce an electrical signal proportional to applied force. The 4-conductor cable carries excitation voltage and returns the analog output signal.
Bidirectional Sensitivity
TCM cells sense both tension and compression in a single transducer. This eliminates the need for separate load cells or reversal logic in test applications. The bridge output correctly indicates force direction via signal polarity.
Mechanical Integration
The threaded design allows the load cell to be screwed directly into threaded bores or hydraulic adapters. This reduces assembly time and eliminates flexing that can occur with bolted mounting. Stainless steel resists corrosion in damp environments and food/beverage applications.
Who Uses Inline Threaded Load Cells
Load testing machines, universal tensile testers, compression frames. Direct thread mount simplifies fixture design and reduces adapter count.
Strength testing of polymers, composites, metals. Bidirectional sensing eliminates load cell swap time in reversal tests.
Pressure relief verification, pump load measurement. Threads match ISO/SAE porting standards.
Clamp force monitoring, tension control in wire/cable manufacturing. Inline insertion reduces downtime during changeouts.
Component validation, fixture development, custom assembly qualification. Compact form factor fits confined spaces.
Selection Guide
Choosing the correct TCM model requires matching load range and thread compatibility to your application.
Step 1: Determine Load Range
Calculate the maximum force (tension or compression) your application will impose. Select a load cell with rated capacity at least 25% above your peak load to preserve accuracy and extend service life.
- TCM325: 2,000–3,000 lbf — Light fixture verification, material tensile tests under 3 kips.
- TCM350: 4,000–5,000 lbf — Mid-range assembly forces, pressure transducer calibration.
- TCM375: 7,500–10,000 lbf — Heavy clamp forces, structural testing.
Step 2: Verify Thread Type
Check your fixture bore or adapter threads. TCM cells are available in both imperial (UNF) and metric (ISO) threading. If your equipment uses 3/8-24 UNF bores, order TCM325 imperial. If your system specifies M10 ports, use TCM325 metric.
Step 3: Confirm Cable Route
The standard 10 ft cable exits the base of the load cell. Verify adequate routing space in your fixture. Custom cable lengths are available upon request.
Step 4: Check Environmental Constraints
TCM load cells operate from −42°C to 93°C. Stainless steel construction handles humidity and light chemical exposure. For submerged or spray applications, consult our engineering team regarding optional sealing.
Installation & Integration
Threading and Torque
Install the load cell by screwing into a threaded bore or ISO-ported cavity. Engage at least 5 full thread pitches (0.21″ for 3/8-24, 0.25″ for 1/2-20, 0.3″ for 3/4-16). Do not exceed 80 ft-lbf torque to avoid internal strain gauge damage.
Cable Connection
The 28 AWG shielded cable terminates at your signal conditioning or data acquisition unit. Excitation supply (10V DC or AC) connects to the two power conductors. Signal lines return the proportional voltage output. Verify polarity before powering: red = excitation+, black = excitation−, white = signal+, green = signal−.
Shielding & Grounding
Route the cable away from high-current power lines to minimize 50/60 Hz noise coupling. Ground the shield at the signal conditioning unit only to avoid ground loops.
Load Introduction
Apply load gradually. Shock loading (sudden impact) can exceed calibration range and damage the transducer. For dynamic testing, ensure the threaded base is fully seated before cycling loads.
Temperature Compensation
TCM load cells are compensated for 15–72°C. Outside this band, output will drift. For applications outside the compensated range (down to −42°C or up to 93°C), apply software correction using calibration data or consult engineering for custom compensation curves.
Detailed Specifications
| Parameter | Specification |
|---|---|
| Nonlinearity | ±0.25% FS (over 0–100% load) |
| Hysteresis | ±0.25% FS |
| Repeatability | ±0.05% FS |
| Output Impedance | 350±5 Ω |
| Input Impedance | 410±30 Ω |
| Rated Excitation | 10V DC or AC |
| Maximum Excitation | 15V (brief, for conditioning units without current limit) |
| Operating Temperature | −42 to 93°C |
| Compensated Temperature | 15 to 72°C |
| Cable | 4-conductor 28 AWG shielded, 10 ft (3 m) standard |
| Material | Stainless Steel (body, threads) |
| Measurement Direction | Bidirectional (tension and compression) |
Standards & Calibration
Calibration Traceability
All TCM load cells ship with NIST-traceable calibration certificates. Calibration is performed to ASTM E4 (tension) and ASTM E9 (compression) standards using calibrated load frames at our Buffalo Grove facility.
Recommended Recalibration Interval
For critical applications, recalibrate every 12 months. Heavy-use environments or applications near full-scale capacity may require more frequent recalibration. Contact our calibration services team for custom schedules.
Certification Available
ISO 9001 manufacturing and testing protocols are documented. Third-party certifications (IATF, FDA compliance documentation) available upon request.
TCM vs. Futek FSH Equivalents
TCM inline threaded load cells directly replace Futek’s discontinued LCM series (also rebranded as FSH compression/tension models). The table below maps equivalents and highlights key advantages.
| Transcell Model | Futek Equivalent | Capacity | Transcell Advantage |
|---|---|---|---|
| TCM325-2KLBF | FSH04009 | 2,000 lbf | 2-year lead time reduction. Domestic US stock. |
| TCM325-3KLBF | FSH04006 | 3,000 lbf | Shorter delivery. Higher repeatability (±0.05% vs ±0.1%). |
| TCM350-5KLBF | FSH04078 | 5,000 lbf | $80 lower cost. Better environmental package (stainless). |
| TCM375-7.5KLBF | FSH04081 | 7,500 lbf | Immediate availability. Metric thread option. |
| TCM375-10KLBF | FSH04082 | 10,000 lbf | Single-unit swap. No code changes required. |
Frequently Asked Questions
Ready to Integrate TCM Load Cells?
Start with a quote or technical consultation. Our team can verify compatibility with your fixtures and recommend the right series for your load range.
Engineering Support
Questions about load cell selection, installation, or custom configurations?
Our technical team is ready to help with fixture design, environmental challenges, or application requirements.
sales@transcell.com