SPM Instrument AB • Box 504 • SE-645 25 Strängnäs • Sweden
Technical data are subject to change without notice.
Tel +46 152 225 00 • Fax +46 152 15075 • info@spminstrument.se • www.spminstrument.com
ISO 9001:2000 certified © SPM 2017-09. 71947 B
25
Vibration transducers TRV
min. 16
M8
min. 10
max. 0.7
ø 6.9
min. 12
(ø 5.5)
VIB Transducers, Series TRV
The transducers series TRV are piezo-electric ac-
celerometers of compression type with built-in
pre amplifier, designed for vibration monitoring of
industrial machinery. The cable length between
transducer and meas uring unit is max. 50m (165 ft).
The transducer is mounted against a smooth, flat
surface on the machine. TRV-18/20 has thread
size M8 and TRV-19/21 has UNF 1/4”-28. The
transducers are delivered with three washers for
adjusting the connector angle. Each washer turns
the transducer 90°. The coaxial cable (SPM 90005-
L or 90267-L) with TNC connector must be secured
with a clamp close to the transducer.
In moist environments, use sealing TNC cable
plugs SPM 13008 to prevent cable corrosion. For
electric insulation, use insulation foot TRX-18/19.
Technical data
Nom. sensitivity, main axis
TRV-18, TRV-19: 1,2 mV/m/s
2
*
TRV-20, TRV-21: 4,0 mV/m/s
2
*
Transverse sensitivity: max. 10%
Typical basestrain sensitivity: 0.01 m/s
2
/μ strain
Linear frequency range
TRV-18, TRV-19 3 to 1000 Hz
TRV-20, TRV-21 2 to 5000 Hz
Max. peak acceleration: 600 m/s
2
Temperature range: –20 to +125 °C
(-4 to +260 °F)
Typical temperature drift: 0.25% / °C
Casing: Stainless steel,
acid proof,
AISI 316 (SS 2382)
Design: Sealed
Weight: 135 grams (5 oz)
Connector type: TNC
Torque limit: 10 Nm (7.4 lbf/ft)
* Individual value given on the calibration chart.
Moist environment:
SPM 13008
Electric
insulation:
TRX-18, TRX-19
t
17
54
9
ø 27.5
ø 15
Measuring direction
Cable
clamp
TRV-18
TRV-19
TRV-20
TRV-21
TRX-18
TRX-19
(UNF
1/4”-28)
Tools for mounting
81027 Holder for counterbore
81057 Counterbore, diam. 20 mm
81030 Pilot for UNF 1/4”
81031 Pilot for M8
TRV-18 / TRV-20: t = M8
TRV-19 / TRV-21: t = UNF 1/4”- 28
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