Model · Hansford Sensors
HS-421S 4–20 mA vibration sensor (velocity) + AC output
4–20 mA vibration sensor (velocity) + AC output. 4 versions — compare the versions and choose the one to order.

HS-421S versions
| Version | Cable exit | Connector / cable |
|---|---|---|
| HS-421S 4–20 mA vibration sensor (velocity) with additional AC output, side exit, flame-retardant FR cable | Side exit | FR cable |
| HS-421S 4–20 mA vibration sensor (velocity) with additional AC output, side exit, PUR cable | Side exit | PUR cable |
| HS-421S 4–20 mA vibration sensor (velocity) with additional AC output, side exit, braided cable | Side exit | Braided cable |
| HS-421S 4–20 mA vibration sensor (velocity) with additional AC output, side exit, M12 connector | Side exit | M12 |
Specifications shared by all versions
As specified by the manufacturer. Version-specific parameters are on each variant's page.
- Measured quantity
- Vibration acceleration, Vibration velocity
- Number of measuring axes
- 1 axis
- Output type
- AC (IEPE) — acceleration, 4–20 mA
- Mounting thread
- 1/4"-28 UNF, male (standard), M6 × 1 mm, male, M8 × 1.25 mm, male
- Electromagnetic compatibility (EMC)
- EN 61326-1:2013
- Case material
- Stainless steel
- Weight
- 185 g (nominal, body only)
Documentation
- HS-421S datasheet (metric units)PDF · Datasheet · EN · 495.5 KB · TS327.12
- HS-421S datasheet (metric units)PDF · Datasheet · EN · 504.6 KB · TS326.12
- HS-421S datasheet (metric units)PDF · Datasheet · EN · 500.3 KB · TS324.13
- HS-421S datasheet (metric units)PDF · Datasheet · EN · 472.7 KB · TS323.11
- HS-421S datasheet (imperial units)PDF · Datasheet · EN · 494.7 KB · TS327U.11
- HS-421S datasheet (imperial units)PDF · Datasheet · EN · 466 KB · TS323U.10
- HS-421S datasheet (imperial units)PDF · Datasheet · EN · 504.3 KB · TS326U.11
- HS-421S datasheet (imperial units)PDF · Datasheet · EN · 499.4 KB · TS324U.12
- HS-421 user manual (and others)PDF · Manual · EN · 288.8 KB
- Stud and pad mounting instructionsPDF · Installation guide · EN · 429.3 KB
Not sure which version to choose?
Describe the machine, the mounting point and the system the signal goes to — we will recommend the cable exit, connector and cable type.