

The wiring of this voltmeter is simple, only two wires need to be connected, the red wire is connected to the positive, and the black wire is connected to the negative. There is reverse connection protection in the meter, and the reverse connection does not burn.
This voltmeter does not require an external working power supply, it can work directly with the measured voltage, and the working voltage range is as wide as 4-30V
In order to achieve the best measurement accuracy, the voltmeter will automatically move the position of the decimal point according to the difference of the measured voltage. decimal point.
This voltmeter can be used to monitor the battery voltage of motorcycles, automobiles, etc., and grasp the battery status in time. It can also be used for other voltage measurement purposes. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
Consider the 1V voltage drop at the voltmeter itself, as we observed it at our labs while testing this Voltmeter.
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General Specification | |
Product Type | DC Voltmeter |
Operating Voltage (VDC) | 4-30 VDC |
Average Current Consumption (mA) | Less than 20mA, generally 5-15mA |
Full Refresh Time (s) | Approx 300mS/time. |
Display color | Red |
Accuracy | 0.1 V |
Working Voltage | 4-30V |
Product Color | black |
Weight (g) | 20g |
Shipment Weight | 0.02 kg |
Shipment Dimensions | 10 × 6 × 1 cm |
Please allow 5% measuring deviation due to manual measurement.
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1 x DC 4-30V Voltmeter LED Display Panel
The latest price of DC 4-30V Voltmeter LED Display Panel in Bangladesh is BDT 190 You can buy the DC 4-30V Voltmeter LED Display Panel at best price from our RoboticsBD or visit RoboticsBD Office.
Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. |
Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0575
Main color: Yellow Measure range: 0.00-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH Calibration: two points automatic calibration
Reference: RBD-0963
Current and voltage display in turn, easy and comfortable to use. Small and portable, do not need other power supply. Measuring range: DC 3V – 9V / 0 – 3A (up to 5A ) Portable Device Interface: USB2.0, USB3.0 Product Weight: 0.025 kg Two output ports
Reference: RBD-1168
Item Name: TDS meter Meter Material: Plastic Display: LCD Digital Accuracy: +/- 2% Range: 0-9990 ppm
Reference: RBD-1177
This signal generator can use 4-20mA to generate voltage and control the current in the circuit. Accuracy up to 0.01; Liquid crystal display; Rotary encoder adjustment ; Two connection terminals are non polarity. Output range can be set; 4-20mA (device control) / -21mA (signal debugging) Display mode can be set, it is convenient for you to see the value...
Reference: RBD-1323
160x128 TFT display Multi function key. Transistor test area. Zener Diode test area. IR receiver window. Micro USB Charging Interface. Charge indicator LED.
Reference: RBD-1518
Operating Voltage: DC 4.8-6V Offer 3 modes to check servos or ESC The Manual Mode allows you to turn the knob to different speeds and check the reaction time The Neutral mode makes the servo go back to the neutral point The Automatic ’’Window Wiper’’ Mode makes the servo swing like a window wiper in the largest angle possible Connect to up to 3 servos...
Reference: RBD-1528
Input: 1S-8S Battery Battery type: Lipo/LiFe/Li-ion/LiMn It has a Buzzer Alarm for low voltage indication. Useful for measuring each cell voltage. Cell Voltage Display Range: 0.5v-4.5v Total Voltage Display Range: 3.7-36v Alarm set values: Off or 2.7-3.8v
Reference: RBD-1556
Model: XH-M240 Display accuracy: 0.1 Measurement accuracy: 1mAH Power supply: DC 5V-12V Standby current: 5-7mA
Reference: RBD-1689
Professional Diamond Selector II, Gem Tester Pen Portable Electronic Diamond Tester Tool for Jewelry Jade Ruby Stone Products are being tested.
Reference: RBD-1718
Model: BT-168 PRO Product Name: Digital Battery Tester Type: Pointer Voltage Measurement Rated Voltage: 9V Measurement Accuracy:0.1V
Reference: RBD-1725
Power supply: DC 12V 1A Power range: 0~150.00W Capacity range: 0~999.999Ah Low voltage stop range: 0~150V
Reference: RBD-1749
2 in 1 Type C USB Tester Color Screen LCD Digital Multimeter, Voltage Current Detector USB Cable Charger Indicator DC3.6-30V/0-5.1A
Reference: RBD-1758
Digital LCD Power Supply Tester for PC ATX/BTX/ITX 4Pin SATA HDD
Reference: RBD-2054
Multi-functional transistor tester. Automatic detection of NPN and PNP transistors, FET, diodes, dual diode, thyristor and SCR. Automatic identification of the transistor pinout. Can be used as a Square signal generator. Can be used as a PWM signal generator.
Reference: RBD-0319
Type K Type. Mounting thread: M6 Temperature Range:0-600°C. RoboticsBD
Reference: RBD-1739
PT100 Temperature Transmitter 0-200 Celsius Range 4-20MA DC 24V
Reference: RBD-1847
Compact Design Country Specific pressure Multiple Displayable Unit Multi-colored, two-part display Alphanumeric display Discontinued by Manufactured 2017
Reference: RBD-1653
Input Voltage: 88~264V/47~63Hz Output Voltage: 12V/4.2A DC Output Power: 50W
Reference: RBD-0565
Compatible with MACH3, Linux CNC (EMC2) etc. parallel-control CNC software. USB power supply and peripherals power phase are separate to protect computer security. All the signals are to-isolate which can protect your computer security. 5-input interface to define the Limit, Emergence-Stop, Cutter alignment, etc. Wide input voltage range: 12-24V, and with...
Reference: RBD-1848
Compact Design Country Specific pressure Multiple Displayable Unit Multi-colored, two-part display Alphanumeric display
Reference: RBD-0566
Fully compliant USB 2.0 standard, backward compatible with USB1.1 Support System: Windows XP, Vista, Windows 7, Linux, MacOS, and WinCE5.0 drive Baud Rate Range: 75bps – 115200bps, up to 6Mbps Supports Plug, Play and hot-swap ( USB side) Better than using CH341D chip or similar chip to support the laptop USB port. Communication distance up to 1.2KM
Reference: RBD-0737
Power supply:5VDC/160mA Switching Voltage (VAC):240@2A Isolation: Phototriac
Reference: RBD-2210
Photoelectric switch sensor DC 10-30V power supply Working current: 200mA Induction distance: 5-30cm Response time: 1ms Output form: DC three-wire normally open NPN NO Detection object: Transparent / opaque object
Reference: RBD-1568
Transmission distance: 1.2 mile (RS-485), 5 meters(RS-232) Transmission Speed: 300-115200 bps Working Modes: Asynchronous, half-duplex, differential transmission Transmission Media: Common wire, doule wire, UTP or Shielding Line Work Environment: -10°C to 85°C
Reference: RBD-1365
Central point temperature measurement high/low temperature auto tracking real-time temperature display Alarm buzzer: >37.2ºC: high temperature audible alarm
Reference: RBD-1916
IC Chip: MAX3232 Operating Voltage: 3.3-5.5V It can be used to program STC MCU, NXP MCU, Renesas MCU, STM32 MCU, N+-2EC MCU Pre-assembled compact size board Suitable for use with most microcontrollers Operates up to 250 kbit/s
Reference: RBD-1860
Model KS-RG22 Coaxial reflection type Supply voltage DC10-30V±10%
Reference: RBD-0411
Low current consumption (typical 30 mA) CW or pulse operation Flat profile Long detection range (20 m) Supply voltage: 4.75V to 5.25V X-Band Frequency: 10.525 GHz Minimum Power Output: 13 dBm EIRP. RoboticsBD
Reference: RBD-0344
Output Sensitivity: 1.0 ± 0.1 mV / V. Two selectable differential input channels. On-chip active low noise PGA with the selectable gain of 32, 64 and 128. On-chip oscillator requiring no external component with optional external crystal. On-chip power-on-reset. Measurement Resolution: 24 bit. RoboticsBD
Reference: RBD-0702
It has a relay status indicator led Power LED(Green), 8 relay status indicator LED(Red) Relay control interface by single-chip IO. Low-level suction close, high-level release. Easy to use, simple 3 line structure. Note: Relay might be different from the picture as per stock
Reference: RBD-0692
Accuracy: +/- 0.2F.S Temperature coefficient: Less than 150ppm/K F.S. Working temperature: 0-100℃ Working humidity: Less than 98% RH
Reference: RBD-0559
Power supply: DC 7-30 V Input Voltage: 0-10V Output current: 4-20mA 0-5V to 4-20mA Linear Conversion
Reference: RBD-2056
Mounting form Polish rod probe The Probe material: Stainless steel Probe diameter: 4mm Length of the probe: 30mm Cabel material Silver plated copper (not insulated), PTFE Silver plated copper (Waterproof, insulated) Accuracy ±(0.3°C+0.5%|t|) Thermal response time: <0.5sSize: 4*30*500mmRange: -50C ~ 200C
Reference: RBD-0686
Supply voltage 5-30VDC Detection distance 10mm (effective detection distance 0-10mm) Load current 150MA (no more than) Output form NPN three lines
Reference: RBD-1870
Compatible with 3.3V and 5.0V power supply. Compatible with 3.3V and 5.0V signal. Semi-hole pads, onboard module, thin PCB, having a thickness of 0.8mm. Has RXD, TXD signal indicator light, monitor send and receive status.
Reference: RBD-1900
600 V Cat III safety rating 50% bigger display with bright white backlight Voltage, resistance, continuity, capacitance Input terminal for ac and dc current measurements to 10 A current Diode test, data hold Made in China
Reference: RBD-1344
Supply voltage range: DC 7 V ~ 35 V Output voltage signal: 0 ~ 2.5 v, 3.3 v, 5 v, 10 v, 15 V. 4-20mA to 0-15V,0-5V,0-10V
Reference: RBD-1816
Anti-Interference Ability Baud rate: 110 ~ 256000bps Operating Voltage: 3v to 30VDC Compatible With Both 3V and 5V logic
Reference: RBD-1834
PT100 to 0-5V Converter Voltage Signal Conditioner PCB-mounted
Reference: RBD-0695
Integration Lowers System Cost, Simplifies Design Efforts, and Reduces Design Cycle Time High Accuracy Facilitates Meeting Error Budgets 15-Bit ADC Resolution; Nominal Temperature Resolution 0.03125NC (Varies Due to RTD Nonlinearity) Total Accuracy Over All Operating Conditions:
Reference: RBD-0276
The INA125 is a low-power, high-accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit. A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250µV), low offset drift...
Reference: RBD-1857
Output: NPN Model KT-RG22 Coaxial reflection type Supply voltage DC10-30V±10% Can be used in all kinds of machines
Reference: RBD-0321
New PT-100 Temperature Sensor AvailableClick Here PT100 Platinum Resister Temperature Sensor Waterproof Probe -20℃ ~ 450℃
Reference: RBD-0492
Proximity-sensing / Diffuse Type Voltage: DC 6-36V Current: 300mA Sensory Distance: 5mm
Reference: RBD-2094
The module can detect the surrounding environment of the humidity and temperature High reliability and excellent long-term stability The output from the digital output Humidity measuring range: 20%~90%RH(0~50 degree (temperature compensation). Temperature measuring range: 0~+50degree. Humidity measurement accuracy: ±5.0%RH. Temperature measurement...
Reference: RBD-1358
Product Name : Correction Capacitor Model No. : 104J100 Type : Radial Lead Withstand Voltage : 100V
Reference: RBD-1300
Size: 5mm Color: BLUE Head Shape: Round Lens Appearance: Transparent
Reference: RBD-0408
Low Level Trigger Relay Module. RoboticsBD Two separate LEDs for On/Off indication of the Relay. Triggering input voltage 3.3V – 5V Two separate LEDs for On/Off indication of the Relay Triggering input voltage 3.3V – 5V 4) Back EMF protection Back EMF protection 2 LEDs to indicate when relays are ON. Works with logic level signals from 3.3V or 5V devices...
Reference: RBD-1349
For Standard LCD 16x2. Press here.For Standard LCD 16x2 with Male Header. Press hereFor Standard LCD 16x2 with Female Header. Press hereFor Standard LCD 16x2 with I2C adapter board soldered. Press here.For Standard LCD 16x2 with White Background. Press here.For Standard LCD 16x2 with Blue Background. Press here. Model: LCD1602 Interface: I2C Interface...
Reference: RBD-1360
PN junction rectifier diode. One direction flow of Current. Used for conversion of AC power to DC. 1N 4007 is electrically compatible with other rectifier diodes Used instead of any of the diode belonging to 1N400X series
Reference: RBD-0910
Entry-level digital multimeters Palm Size Battery test (UT33B+) Work safely in CAT II 600V environment
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical