The PCB Piezotronics Model 485B39 is a pocket-sized, 2-channel signal conditioner that powers ICP® accelerometers and microphones and sends their signals straight to a computer over USB. It digitizes both channels with a 24-bit A/D converter and is powered entirely from the USB port, so no batteries or external supply are needed.
The 485B39 enumerates as a standard USB audio device, so it works plug-and-play with Windows, macOS and Linux and with common vibration, acoustic and audio analysis software without special drivers. Two BNC inputs accept sensors directly, and the rugged stainless steel housing is small enough to carry in a pocket or tool bag for route-based checks, troubleshooting and lab work.
Features and Benefits
- Two ICP® sensor channels with 24 VDC / 4 mA constant-current excitation
- 24-bit A/D conversion with sample rates from 8 kHz to 48 kHz
- 0.8 Hz to 20.7 kHz frequency range (±5%) and ±10 V input range
- USB-powered, under 500 mW, with no external power supply or batteries
- Plug-and-play USB class 1 audio interface, no driver installation
- Compact stainless steel housing with 2 BNC inputs and integral USB cable
Choose Your Version
| Model |
Inputs |
USB Connector |
| 485B39 |
ICP® on both channels |
USB-A |
| V485B39 |
Voltage on both channels (no ICP supply current) |
USB-A |
| IV485B39 |
ICP® on channel 1, voltage on channel 2 |
USB-A |
| 485B39-C |
ICP® on both channels |
USB-C |
| V485B39-C |
Voltage on both channels (no ICP supply current) |
USB-C |
| IV485B39-C |
ICP® on channel 1, voltage on channel 2 |
USB-C |
Typical Applications
- Portable vibration and noise measurements with a laptop or tablet
- Machinery troubleshooting and quick spectrum checks
- Sensor verification and lab or classroom data acquisition
Specifications
Performance
| Channels | 2 |
|---|
| Input range (nominal) | ±10 V pk (±8 V pk guaranteed) |
|---|
| Frequency range (±5%) | 0.8 to 20,700 Hz |
|---|
| Low frequency response (-3 dB) | 0.5 to 1 Hz (sample rate dependent, 8 to 48 kHz) |
|---|
| Anti-aliasing filter corner frequency | 22.9 kHz (-3 dB, proportional to sample rate) |
|---|
| Digital output (interface) | USB class 1 audio |
|---|
Environmental
| Operating temperature | 14 to 176 °F (-10 to +80 °C) |
|---|
| Storage temperature | -40 to 176 °F (-40 to +80 °C) |
|---|
Electrical
| DC power (USB) | <500 mW (5 V at <100 mA) |
|---|
| Excitation voltage to sensor (±5%) | 24 VDC |
|---|
| Constant current excitation (±5%) | 4 mA |
|---|
| Discharge time constant | 1.5 sec |
|---|
| Electrical isolation (case) | Grounded |
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| Internal ADC | 24-bit (16-bit selectable by software) |
|---|
| Supported sample rates | 48, 44.1, 32, 22.05, 16, 11.025, 8 kHz |
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Physical
| Input connector (sensor) | 2 BNC jacks |
|---|
| Output connector | 11 in (28 cm) integral USB cable, Type A (Type C on -C models) |
|---|
| Height | 0.7 in (19 mm) |
|---|
| Width | 1.5 in (39 mm) |
|---|
| Length | 2.4 in (60 mm) |
|---|
| Weight | 4.4 oz (125 g) |
|---|
| Housing material | Stainless steel |
|---|
Versions
| 485B39 | ICP inputs, USB-A |
|---|
| V485B39 | Voltage inputs (no ICP supply current), USB-A |
|---|
| IV485B39 | ICP (CH 1), voltage (CH 2), USB-A |
|---|
| 485B39-C | ICP inputs, USB-C |
|---|
| V485B39-C | Voltage inputs (no ICP supply current), USB-C |
|---|
| IV485B39-C | ICP (CH 1), voltage (CH 2), USB-C |
|---|
Shipping
| Package | 6 x 4 x 3 in |
|---|
| Shipping weight | 0.8 lb |
|---|
Shipping
| Carriers | UPS or FedEx for domestic orders; FedEx for international orders |
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| Shipping cost | Calculated automatically at checkout for US orders. International orders require a complete ship-to address with postal code. |
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| Freight terms | FOB shipping point, freight prepaid. Title passes to the buyer at the vendor's dock. |
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| Hazardous items | Epoxy adhesives, batteries and paint markers cannot ship by air freight |
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| International | Shipping fees do not include taxes, tariffs or duties |
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Returns
| Return window | 7 calendar days from delivery. Contact us before returning any item. |
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| Condition | New, unaltered and unused. Special and custom orders are not returnable. |
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| Restocking fee | 15% on non-defective items that are not being exchanged |
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| Full policy | Refund / Return Policy |
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See our Shipping & Billing Terms for how estimated shipping is charged, and our Refund / Return Policy.
Questions about shipping on this item? Call
(214) 238-0493 or
contact us.
