HS-421 4–20 mA vibration sensor (velocity) with additional AC output, top exit, halogen-free HFFR cable

Outputs: 4–20 mA (vibration velocity) and AC (acceleration), 4-core halogen-free HFFR cable.

Output AC IEPE + 4–20 mA
Exit Top exit
IP IP68
Cable HFFR cable

Ordering options

Measuring range — velocity

Mounting thread

You do not have to choose every option — we will agree the rest in the quotation.

Quantity

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-421 · as of 07/10/2026

Key features

Halogen-free cable
Oil resistance
For PLC / DCS systems and data collectors
Piezoelectric element in compression design

Technical specifications

Parameters as specified by the manufacturer.

Measurement
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 signal
Output type	AC (IEPE) — acceleration, 4–20 mA

Connection and mounting
Cable / connector exit	Top exit
Integral cable	Halogen-free HFFR (polyolefin)
Number of cable cores	4
Mounting thread	1/4"-28 UNF, female (standard), 1/4"-28 UNF, male, Quick Fit, female, M6 × 1 mm, male, M8 × 1.25 mm, male, M10 × 1.5 mm, male

Operating conditions and protection
IP rating	IP68
Operating temperature	−55 … +130 °C
Electromagnetic compatibility (EMC)	EN 61326-1:2013

Construction
Sensing element	PZT — compression
Case material	Stainless steel
Weight	150 g (nominal)
Features	Oil-resistant, Halogen-free cable, For data collectors, For PLC / DCS systems