Overview
The Helm HT400 is a strain-gain load sensing transducer engineered for industrial metal stamping applications. This transducer accurately detects strain levels on all types of metal stamping presses, providing real-time load monitoring with laboratory-grade precision. All HT400 sensors are machined within 1% and may be interchanged without recalibration of the press, reducing downtime and setup costs.
Key Features
- Strain gages in a 350 ohm full wheatstone bridge circuit are used as load sensing elements to assure long-term stability and accuracy
- Flexible mounting options—drill/tap or weld/pad—for installation on upright columns of straight side presses or throat area of OBI and Gap Frame presses
- Shielded, oil-resistant polyurethane cable included with standard 35-foot length
- When interfaced with Helm monitoring systems, linear output of strain levels at each sensing location are displayed on digital meters
- Standard sensor supplied with 35 feet of cable, four mounting screws, two anti-torque washers, and hex wrench
Technical Specifications
The HT400 combines precise measurement with robust design for demanding press environments:
- Measurement Range: 400 microstrain (nominal capacity)
- Overload Rating: 600 microstrain maximum
- Recommended Excitation: 8V AC/DC
- Maximum Excitation: 15V AC/DC
- Output: 1 mV/V
- Cable: Shielded, 4-conductor, oil-resistant polyurethane
- Standard Cable Length: 35 feet (Model HT-400-35)
- Dimensions: 1″ × 2¾” × 5/16″
- Weight: 0.38 kg (0.85 lbs)
- Bridge Circuit: 350 ohm full wheatstone bridge
- Mounting Method: Drill/tap or weld/pad
Typical Applications
The Helm HT400 is ideal for:
- Metal stamping press load monitoring and overload protection
- Straight side and Gap Frame press strain measurement
- Real-time load display and alarm systems
- Press die protection and tonnage verification
- Industrial quality control and process monitoring
Compatibility & Replacements
Compatible With
- Helm load monitoring and control systems
- Press management software displaying real-time strain output
- Digital meters and analog gauges with 1 mV/V excitation input
- Shielded 4-conductor measurement terminals
- Standard 8V AC/DC or 15V DC excitation power supplies
Replaces / Drop-In Replacement For
- Older Helm strain-gain models with equivalent 400 µStrain capacity
- Legacy press load-sensing transducers requiring interchangeable sensors
- Verify compatibility with your press manufacturer or system integrator before ordering
Works With
- Helm strain monitoring systems and display modules
- Industrial PLC and data acquisition systems with analog input modules
- Press control systems using wheatstone bridge sensor input
- Standard 4–20 mA or 0–10V signal conversion modules
