Brand: PCB Piezotronics

PCB Piezotronics 378B02HT Acoustic Sensor

Name: PCB Piezotronics 378B02HT Acoustic Sensor – Manual & Quote
Brand: PCB Piezotronics

Description

Overview

The PCB Piezotronics 378B02HT listed here corresponds to PCB Model HT378B02, a high-temperature ICP® microphone system. It combines the 1/2 in. prepolarized free-field microphone cartridge Model 377B02 with the high-temperature preamplifier Model HT426E01 and is supplied as a calibrated system with TEDS.

The system is intended for acoustic measurements near hot surfaces, such as powertrain, engine, manifold and exhaust noise testing, with operation up to +120 °C. As PCB uses the designation HT378B02, the model is confirmed with the customer before quotation.

Key Features

1/2 in. prepolarized free-field microphone system (377B02 + HT426E01)
Operating temperature −40 to +120 °C
Sensitivity 50 mV/Pa
Frequency range 3.5 Hz to 20 kHz (±2 dB)
Dynamic range >137 dB
ICP® constant-current powered with TEDS (IEEE 1451.4)

Technical Specifications

Parameter	Value
Model	HT378B02 (listed as 378B02HT)
Microphone cartridge	Model 377B02, 1/2 in., prepolarized, free-field
Preamplifier	Model HT426E01
Sensitivity	50 mV/Pa (−26 dB re 1 V/Pa)
Frequency range	3.5 Hz to 20 kHz (±2 dB); 6 Hz to 10 kHz (±1 dB)
Dynamic range	>137 dB (3% THD)
Inherent noise	<17 dB(A) re 20 µPa
Operating temperature	−40 to +120 °C
Excitation voltage	20 to 32 V DC
Constant current	2 to 10 mA
Connector	BNC
TEDS	IEEE 1451.4
Size (diameter × length, with grid cap)	13.2 mm × 98 mm
Nominal diameter	1/2 in (12.5 mm)
Polarization voltage	0 V (prepolarized)
Standard 378B02 system temperature limit (for comparison)	-40 to +80 °C

Applications

Engine, manifold and exhaust noise measurement in test cells
Powertrain and vehicle NVH testing near hot components
Acoustic testing close to hot machinery and process equipment

PCB Piezotronics HT378B02 Selection Notes

The PCB product sheet shows the HT378B02 next to the standard Model 378B02, which makes the difference clear. Both use a 1/2 inch prepolarized free-field cartridge rated to +120 °C. In the standard system the Model 426E01 preamplifier is only rated to +80 °C, so the whole system is limited to +80 °C. The HT version replaces it with preamplifier Model HT426E01, rated -40 to +120 °C, which lifts the limit of the complete system to +120 °C. The HT assembly is also longer: 98 mm with grid cap, against 86 mm for the standard model.

The excitation current window is narrower on the HT version: 2 to 10 mA, compared with 2 to 20 mA for the standard 378B02. Signal conditioners or front-ends that are set to a higher ICP current should be checked or adjusted before the HT system is connected.

PCB lists engine analysis, manifold testing, exhaust pipes, transfer path analysis and HVAC tests as intended uses, and positions the model as an alternative to probe microphones where the temperature at the measuring point is up to +120 °C. The output connector is BNC and the system is TEDS compliant to IEEE 1451.4.

Why Seven Star LLC

Seven Star LLC supplies PCB Piezotronics acoustic and vibration sensors to test laboratories and industrial facilities across Oman and the GCC. The manufacturer designation and calibration documentation are checked against PCB data before the order is confirmed.

Request a Quote for PCB Piezotronics 378B02HT Acoustic Sensor

Submit a formal inquiry with the model HT378B02 (378B02HT), the quantity, your measurement application and the signal conditioning or DAQ in use. Inquiry Form

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About brand

PCB Piezotronics, founded in 1967 in Depew, USA, makes sensors for dynamic measurement: accelerometers, pressure and force sensors and measurement microphones, most of them using the company's ICP built-in electronics. Test laboratories and machinery engineers know them as PCB sensors. Seven Star LLC sources and supplies PCB Piezotronics accelerometers and acoustic sensors for customers in Oman, including the models described below.

PCB sensors listed here

Model 356A01 is a miniature triaxial ICP accelerometer with a ceramic shear element and titanium housing. PCB gives it a nominal sensitivity of 5 mV/g, a range of 1000 g peak and a weight of about one gram; it is adhesive mounted and has an integral four-conductor cable. Model 378B02 is a 1/2-inch prepolarized free-field microphone supplied with a mated ICP preamplifier and TEDS, at 50 mV/Pa.

Ordering PCB sensors: what we need

Send the exact model number, including any prefix letters. PCB puts option codes in front of the base model, so a high-temperature or metric version carries a different prefix. Add the cable length and connector, and the signal conditioner or analyzer input you are using. For GCC test laboratories we can request the manufacturer's calibration certificate with the sensor.

Browse PCB Piezotronics products by category: Vibration.

Frequently Asked Questions

What is the PCB 378B02HT?

The 378B02HT is a precision acoustic measurement sensor from the PCB Piezotronics product range, used in acoustic testing and measurement applications.

Which brand is this sensor?

The genuine product is manufactured by PCB Piezotronics.

What does the HT designation mean?

The HT designation identifies the specific variant of the 378B02 series. Confirm the full model details with Seven Star LLC for the exact configuration.

What signal conditioning is needed?

The sensor interfaces with standard signal conditioning and data acquisition systems used for acoustic measurement. Seven Star LLC can confirm the matching setup.

What is the sensor used for?

The sensor is used for acoustic testing and measurement, including product acoustic testing, environmental acoustics and laboratory measurements.

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