Hansford SensorsHS-421S seriesWith additional AC output
HS-421S 4–20 mA vibration sensor (velocity) with additional AC output, side exit, flame-retardant FR cable
Outputs: 4–20 mA (vibration velocity) and AC (acceleration), flame-retardant (FR) cable.
- Output AC IEPE + 4–20 mA
- Exit Side exit
- IP IP65
- Cable FR cable
Technical data is taken from the manufacturer's documentation. Before ordering, please confirm the parameters against the current datasheet or with our engineer.
HS Sensors · HS-421S · as of 07/10/2026
Key features
- For PLC / DCS systems and data collectors
- Low-smoke halogen-free cable
- Piezoelectric element in compression design
Technical specifications
Parameters as specified by the manufacturer.
| Measured quantity | Vibration acceleration, Vibration velocity |
|---|---|
| Number of measuring axes | 1 axis |
| Measuring range — velocity | 10 / 20 / 25 / 50 / 100 mm/s (standard: 10) |
| Output type | AC (IEPE) — acceleration, 4–20 mA |
|---|
| Cable / connector exit | Side exit |
|---|---|
| Integral cable | Flame-retardant (FR) |
| Mounting thread | 1/4"-28 UNF, male (standard), M6 × 1 mm, male, M8 × 1.25 mm, male |
| IP rating | IP65 |
|---|---|
| Operating temperature | −25 … +90 °C |
| Electromagnetic compatibility (EMC) | EN 61326-1:2013 |
| Sensing element | PZT — shear |
|---|---|
| Case material | Stainless steel |
| Weight | 185 g (nominal, body only) |
| Features | Halogen-free cable, For data collectors, For PLC / DCS systems |
| Model | HS-421S |
|---|---|
| HS Sensors part no. | HS-421S-SIDE-FR |
| Manufacturer's product name | HS-421S – Side Exit – Integral FR Cable Dual Output Accelerometer |
Documentation
- HS-421S datasheet (metric units)PDF · Datasheet · EN · 495.5 KB · TS327.12
- HS-421S datasheet (imperial units)PDF · Datasheet · EN · 494.7 KB · TS327U.11
- HS-421 user manual (and others)PDF · Manual · EN · 288.8 KB
- Stud and pad mounting instructionsPDF · Installation guide · EN · 429.3 KB
- HS-421S 3D CAD modelZIP · 3D CAD model · EN · 57 KB
Other HS-421S versions
All HS-421S variantsThe same model with a different cable exit, connector or cable type.
Where it is used
Typical applications
- Fans
- Electric motors
- Pumps
- Compressors
- Centrifuges
- Conveyors
- Air handling units
- Gearboxes
- Rolls
- Dryers
- Presses
- Cooling systems
- HVAC systems
- Spindles
- Machine tools
- Process equipment
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