Test/Measure/Experiment
Testing and measuring related tools and equipment
We found this little unit great to measure our incoming solar power versus outgoing battery load on a second unit
DC 0-30V 3 Wire LED Voltmeter Digital Display Panel Volt Meter (2A5 dc 3 wire volt meter)
Features:
Display Color: Red
The black line connects to the negative electrode, red line connects to positive pole of power supply, yellow line connects to positive pole of tested power supply
Material: Plastic Shell
Display Digit: 3
Measuring Range: DC 0-30V
Working voltage: 4-30V
Working voltage: 4-30V
Display Size: Approx 2.3cm x 1.2cm / 0.91" x 0.47"
Overall Dimension: Approx 3.4cm x 2.2cm x 2cm / 1.34" x 0.87" x 0.79" (L x W x H)
Cable Length: Approx 20cm / 7.87"
Package Includes:
1 x Digital LED Display Voltmeter
GPIO Reference Board (Model B+,A+,2B and 3B) (1C3 gpio ref 40pin board)
RASPBERRY PI NOT INCLUDED(Neither the key-ring and keys for those who wondered)
This cute little GPIO reference board from allows you to quickly and easily distinguish between the different pins of the Raspberry Pi Model B+, Raspberry Pi 2B, Pi 3B and Pi 3B+. It's even got a key chain hole, so you can carry it around and keep it handy - you'll never know when you need to hack a Pi!
The GPIO reference board features BCM numbering on one side and the pin names on the other. It can be soldered for permanent referencing, or slipped on and off when required.
Dimensions:
Width = 67mm
Height = 19mm
Thickness = 0.8mm
On the RPi3 and later you'll have to snip off a little bit of the corner closest to pin 39 thanks to the new POE pins on the board
On the RPi3 and later you'll have to snip off a little bit of the corner closest to pin 39 thanks to the new POE pins on the board
Dual Experimental kit RPI and Uno (1A3 Dual experimental board kit)
PLEASE NOTE: RASPBERRY PI AND ARDUINO NOT INCLUDED
Description:
This is an Experimental Platform For Raspberry Pi 2/3 Model B and B+ and Arduino UNO R3
With Breadboard, Male to Female jumper cables, T type 40Pin GPIO, Ribbon Cable.
Package includes:
1 x Acrylic Platform (with Installation screws pack)
1 x Breadboard 800
10 x Male to Female jumper cables (Length: 25cm±2cm)
1 x T type 40Pin GPIO
1 x 40 pin ribbon Cable (20cm±2cm Length)
Description:
This is an Experimental Platform For Raspberry Pi 2/3 Model B and B+ and Arduino UNO R3
With Breadboard, Male to Female jumper cables, T type 40Pin GPIO, Ribbon Cable.
Package includes:
1 x Acrylic Platform (with Installation screws pack)
1 x Breadboard 800
10 x Male to Female jumper cables (Length: 25cm±2cm)
1 x T type 40Pin GPIO
1 x 40 pin ribbon Cable (20cm±2cm Length)
RJ45 RJ11 2-in-1 Network and Phone Cable Tester (1C3 RJ45 tester)
The cable tester can be used for RJ45 networks, RJ11 and telephone cables. It can test the cables with reliable accuracy. This is a useful tool for technicians in installation and maintenance.
- Tests both RJ45 (max 8-pin Network) and RJ11 (max 6-pin phone)
- Powered by a single 9V cell battery(not included)
- Powered by a single 9V cell battery(not included)
- Carrying case not included
Servo Tester Third Gear Switch With Indicator Light 4.2V To 6.0v (1D4 Servo tester blue)
Description:
Item Name: Servo Tester
Size: 46x32x17mm
Weight: 8g
Color: Blue
Input: DC 4.2 to 6.0V
Output: ≤15mA (5.0)
Output signal: 1.5ms±0.5ms
Adjustment Methods: Manual, Neutral, Automatic.
Features:
Small size,low power consumption,high reliability and easy operation.
It can easily detect and configure server virtual bit, jitter and middle position.
Can connect two servos or ESC;
MCU control,good stability,high accuracy.
Note:
This product can't test a servo with a weight more than 55g.
If you want to test the motor,please first connect the ESC.
Package Includes:
1x servo tester
Item Name: Servo Tester
Size: 46x32x17mm
Weight: 8g
Color: Blue
Input: DC 4.2 to 6.0V
Output: ≤15mA (5.0)
Output signal: 1.5ms±0.5ms
Adjustment Methods: Manual, Neutral, Automatic.
Features:
Small size,low power consumption,high reliability and easy operation.
It can easily detect and configure server virtual bit, jitter and middle position.
Can connect two servos or ESC;
MCU control,good stability,high accuracy.
Note:
This product can't test a servo with a weight more than 55g.
If you want to test the motor,please first connect the ESC.
Package Includes:
1x servo tester
RJ45 Cat5e Cat6 Network Ethernet LAN Cable Tester Crimper Crimping Tool Kit (1C3 Network tool kit)
Features:
Cable Crimper:
1. Portable style with perfect shape.
2. The mouth of the press-pliers is made of steel, which is hard and durable.
3. It won't damage the shelled-wire and work conveniently with high efficiency.
4. While using press-pliers, just insert the modular plug into its position and press it.
5. Suitable for Cat5, Cat5e, and Cat 6 cable
6. Wire stripper included.
Cable Tester:
1. Test RJ45 and RJ11 network cables
2. Test correspondingly double-twisted cables 1, 2, 3, 4, 5, 6, 7, 8 and Ground.
3. Can judge wrong connection, short circuit and open circuit.
4. Put cables into both main tester and remote tester.
5. The lights of the main tester will turn on sequently from 1 to G.
6. Detachable remote tester, test remote cable up to 1000ft. in length.
7. Power supply: DC 9V battery.
8. Come with protective leather case.
100 RJ45 RJ-45 CAT5 Modular Plug Network Connector
1. RJ45 RJ-45 Connectors Modular Plug 1000 Plugs Pack Model PCRJ1000
2. 8 Pins Network Cable Heads / Plugs. Plugs for UTP Cat5, Cat5e solid or stranded wire solid or stranded Cable.
3. Gold plated leads for better data transmitting and higher signal strength
Package Includes:
1 x Network Crimper
1 x Cable Tester
1 x Wire Stripper
100 x RJ45 RJ-45 CAT5 Modular Plug Network Connector
ModMyPi Pi Zero Breadboard Case (4A2 MMP exp zero breadboard)
Need a case with prototyping space for your shiny Raspberry Pi Zero, we've got on for you! Made with our trademark stealth-matte black acrylic, and accented with clear (to leave the good bits visible), the case itself is constructed 4 unique acrylic layers, and comes complete with a side by side half-size breadboard for all your hacking needs!
Features:
- 4 Part Acrylic Layer Case
- Includes Half-Size Breadboard for Prototyping
- Fits Raspberry Pi Zero (Not Included)
- Top & Bottom GPIO Pin Access
Need a case with prototyping space for your shiny Raspberry Pi Zero?
Liitokala Lii-402 Micro USB DC 5V 4Slots 18650/26650/16340/14500 Battery Charger (C5 4 bay battery charger)
Specifications:
Product name: Liitokala Lii-402 Micro USB 4Slots Battery Charger
Input : Micro USB DC 5V/2A
Output: 1.42V
4.2V±0.05V
3.65±0.05V
4.35±0.05V
Current: 2000mA*1 1000mA*2 700mA*3 500mA*4
Constant voltage, cut-off current: less than 100mAh
Standby current: less than 15mAh
Compatible with:
Ni-MH/Cd
AA/AAA/A/SC Sizes
3.7V Li-ion battery including
26650,22650,26500,18650,18490,17670,17500,16340,14500,10440
Size: 112mm x 90mm x 30mm (L x W x H)
Weight: 150 grams (incl. micro cable)
1 x Liitokala Lii-402 Micro USB 4Slots Battery Charger
1 x USB Cable
Product name: Liitokala Lii-402 Micro USB 4Slots Battery Charger
Input : Micro USB DC 5V/2A
Output: 1.42V
4.2V±0.05V
3.65±0.05V
4.35±0.05V
Current: 2000mA*1 1000mA*2 700mA*3 500mA*4
Constant voltage, cut-off current: less than 100mAh
Standby current: less than 15mAh
Compatible with:
Ni-MH/Cd
AA/AAA/A/SC Sizes
3.7V Li-ion battery including
26650,22650,26500,18650,18490,17670,17500,16340,14500,10440
Size: 112mm x 90mm x 30mm (L x W x H)
Weight: 150 grams (incl. micro cable)
USB Output function
1. 0pen-circuit voltage of USB output : 4.9-5.3V; and the 4th slot is fixed for the USB discharge power source
2. Output current: 1000mAh
3. Open circuit current: <1mAh
4. The corresponding voltage is 4.75-5.25V under 1000mAh current
5. Cut-off voltage for discharge protection: 3.0±0.1V
You will need a USB micro B cable with power supply for this charger.
1 x Liitokala Lii-402 Micro USB 4Slots Battery Charger
1 x USB Cable
Portable LED tester 2-150mA (1A6 LED tester)
Material: Plastic
Color: White
Handy device for testing LED's. Simply plug your LED into the correct holes (all of which are marked) and push the button to see its brightness, illuminant color, etc.
Handy device for testing LED's (2-150mA)
The top row is for 2 pin LED's with currents ranging from 2mA - 30mA
The bottom row is for 4 pin LED's (piranha LED's) with currents ranging from 20mA - 150mA
Lightweight & compact
Powered by a 9V battery (not included)
Item size(L*W*H) : Approx. 80mm x 55mm x 22mm
Quantity: 1PC
Color: White
Handy device for testing LED's. Simply plug your LED into the correct holes (all of which are marked) and push the button to see its brightness, illuminant color, etc.
Handy device for testing LED's (2-150mA)
The top row is for 2 pin LED's with currents ranging from 2mA - 30mA
The bottom row is for 4 pin LED's (piranha LED's) with currents ranging from 20mA - 150mA
Lightweight & compact
Powered by a 9V battery (not included)
Item size(L*W*H) : Approx. 80mm x 55mm x 22mm
Quantity: 1PC
Anti-Static ESD Wrist Band with Grounding Lead Black (1C3 black anti static wrist)
Features:
1. High quality
2. Double circuit electronic, anti-friction.
3. Loop length can be adjusted.
4. Easy to use and flexible, long life and does not produce dust.
5. Mainly for the production line staff and static index is high individuals within the scope of activities of production and easy to produce static electricity generated in their daily working lives high electrostatic potential
6. Use of "point discharge" principle, to achieve electrostatic collection and release.
2. Double circuit electronic, anti-friction.
3. Loop length can be adjusted.
4. Easy to use and flexible, long life and does not produce dust.
5. Mainly for the production line staff and static index is high individuals within the scope of activities of production and easy to produce static electricity generated in their daily working lives high electrostatic potential
6. Use of "point discharge" principle, to achieve electrostatic collection and release.
Specifications:
1. Main parts: Adopt ABS plastic material synthesis;
2. Wrist ring: Anti-static Elastic Fabric
3. Color: Black
4. Surface resistance: ≤103Ω
5. Electrostatic discharge time: <0. 1s
6. Cable length: 1. 8m/6FT
2. Wrist ring: Anti-static Elastic Fabric
3. Color: Black
4. Surface resistance: ≤103Ω
5. Electrostatic discharge time: <0. 1s
6. Cable length: 1. 8m/6FT
Package includes:
1 x Anti-static Wrist Strap
Interior Panel Mount Temperature Meter - Celsius (Temp panel mount)
Features
Material: Plastic
Indoor temperature °C display.
It comes with a mounting clips which allows it to be panel mounted
Temperature range: -50 ~ + 70 Degrees.
Usage temperature: -10 ~ +50 Degrees.
Usage humidity:5% ~ 80%
Accuracy:+/-01 Degrees.
Distinguishing temperature: 0.1 Degrees.
Power: 2 x DC1.5V AG13 button batteries (Not included)
Cable length:0.8M.
Size:48 x 28 x 15(mm)
Color:Black
Package Includes:
1 x LCD Digital Thermometer Temperature Sensor
Material: Plastic
Indoor temperature °C display.
It comes with a mounting clips which allows it to be panel mounted
Temperature range: -50 ~ + 70 Degrees.
Usage temperature: -10 ~ +50 Degrees.
Usage humidity:5% ~ 80%
Accuracy:+/-01 Degrees.
Distinguishing temperature: 0.1 Degrees.
Power: 2 x DC1.5V AG13 button batteries (Not included)
Cable length:0.8M.
Size:48 x 28 x 15(mm)
Color:Black
Package Includes:
1 x LCD Digital Thermometer Temperature Sensor
Charger Docter - USB Voltage and Current Meter (2A6 USB Docter single)
Description:
You can use this device from 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It flips between voltage and current readouts every 3 seconds or so. It's a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters.
Specifications:
- USB 1.x and 2.x - all data speeds. Does not have USB v3 pins so USB v3 connections will automatically downgrade to v2
- Working Range: 0~3A, 3.5~7VDC
- Resolution: 10mV / 10mA
- Operating Temperature: 0-60ºC
- Contents:
- Camera Board 360 Gooseneck Mount V2
Dimensions:
- 21mm x 53mm x 15mm / 0.8" x 2.1" x 0.6"
- USB Plug: 13mm / 0.5"
- Weight: 16.2g
USB Detector Current Voltage 3V-9V Tester Dual USB Dual display (2A5 USB Docter Dual)
Use the USB Charger Doctor to measure the working voltage and current output for any USB port and project. This plastic dongle plugs between a USB device, and passes the data lines through. There's a 0.05 ohm resistor in line with the power pin that is used to measure current draw. The Doctor's digital display instantly reads the numbers out for testing devices such as chargers, cables, and cell phones.
You can use this device from 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It displays both voltage and current readouts. It's a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters.
ANENG AN8002 Digital Multimeter AC/DC Current Voltage Frequency Resistance Temperature ℃/℉ (1C3 multimeter)
Description:
It is a Auto-ranging digital MultiMate using double-integral style A/D transform as the core.
Can be used to measures Temperature AC/DC Voltage AC/DC Current Resistance Capacitance Diode and Continuity testing temperature Frequency and Etc.
The products are battery powered they are characterized by stable function and high reliability, with the features of overload protection and LCD display for clear reading are an ideal tools for lavatory radio fans and family use.
Features:
Auto Range.
True RMS measurement.
Resistance capacitance frequency file high voltage 550V protection.
Large screen display, the maximum of 6000 words.
Sampling rate: about 3 times per second.
Temperature measuring.
Backlight display.
Data retention.
Polarity automatic recognition.
Low voltage display.
10A large current measurement MA level small current measurement Automatic shutdown.
Main measurement: AC / DC voltage, AC / DC current, resistance, capacitance.
Diode / off measurement, frequency and duty ratio measurement.
Specification:
| Function | Range | Resolution | Accuracy | MAX.Value | Other |
| DC Voltage | 6.000V | 0.001V | ±(0.5%+3) | 1000V | Input Resistance:10MΩ |
| 60.00V | 0.01V | ||||
| 600.0V | 0.1V | ||||
| 1000V | 1V | ||||
| 60.00mV | 0.01mV | 600mV | |||
| 600.0mV | 0.1mV | ||||
| AC Voltage | 6.000V | 0.001V | ±(1.0%+3) | 750V | Input Resistance:10MΩ(600mV range, >60MΩ) Frequency Response: 40Hz-1kHz |
| 60.00V | 0.01V | ||||
| 600.0V | 0.1V | ||||
| 750V | 1V | ||||
| 60.00mV | 0.01mV | 600mV | |||
| 600.0mV | 0.1mV | ||||
| DC Current | 6.000A | 0.001A | ±(1.2%+3) | 10A | MAX.Current: 10A(no more than 15 seconds) No Voltage input at this mode Frequency Response(AC): 40Hz-1kHz |
| 10.00A | 0.01A | ||||
| 60.00mA | 0.01mA | 600mA | |||
| 600.0mA | 0.1mA | ||||
| AC Current | 6.000A | 0.001A | ±(1.5%+3) | 10A | |
| 10.00A | 0.01A | ||||
| 60.00mA | 0.01mA | 600mA | |||
| 600.0mA | 0.1mA |
| Resistance | 600.0Ω | 0.1Ω | ±(0.5%+3) | 60MΩ | No Voltage input at this mode | |||||
| 6.000kΩ | 0.001kΩ | |||||||||
| 60.00kΩ | 0.01kΩ | |||||||||
| 600.0kΩ | 0.1kΩ | |||||||||
| 6.000MΩ | 0.001MΩ | |||||||||
| 60.00MΩ | 0.01MΩ | ±(1.5%+3) | ||||||||
| Capacitance | 9.999nF | 0.001nF | ±(5.0%+20) | 9.999mF | No Voltage input at this mode | |||||
| 99.99nF | 0.01nF | ±(2.0%+5) | ||||||||
| 999.9nF | 0.1nF | |||||||||
| 9.999μF | 0.001μF | |||||||||
| 99.99μF | 0.01μF | |||||||||
| 999.9μF | 0.1μF | |||||||||
| 9.999mF | 0.001mF | ±(5.0%+5) | ||||||||
| Frequency | 99.99Hz | 0.01Hz | ±(0.1%+2) | 9.999MHz | ||||||
| 999.9Hz | 0.1Hz | |||||||||
| 9.999kHz | 0.001kHz | |||||||||
| 99.99kHz | 0.01kHz | |||||||||
| 999.9kHz | 0.1kHz | |||||||||
| 9.999MHz | 0.001MHz | |||||||||
| Duty Cycle | 1%~99% | 0.1% | ±(0.1%+2) | |||||||
| Diode | √(DC forward current is 5mA, voltage is 3V) | No Voltage input at this mode | ||||||||
| Continuity | √(no more than 50Ω) | |||||||||
Temperature | -20~1000℃ | 1℃ | ±(2.5%+5) | 1000℃ | ||||||
| -4~1832℉ | 1℉ | 1832℉ | ||||||||
Measurement mode: double-integral style A/D transform
Sample rate: 3 times per second
Over range indication: OL
Powered by 2 x AAA batteries (Not included).
Working Environment: 0-40 degrees relative humidity: <80%
Product size: approx. 130 x 65 x 30mm/5.11 x 2.55 x 1.18''
Net weight: approx. 170g
Gross weight: approx.238g
Package included:
1 x ANENG AN8002 Digital Ture RMS 6000 Counts Multimeter
2 x Test Lead Set
1 x Temperature Sensing Cable
1 x Storage Bag
1 x English User Manual
130A High Precision DC Watt Meter And Power Analyzer (1A2 DC Power analyzer)
Examples of Uses:
How Much Power Does my Fridge Use - with the Battery connected to the SOURCE side and Car Fridge (or other accessory) connected to the LOAD side. The Watt Meter shows the current into the Fridge, voltage and power at the battery and accumulates the Ah and Wh while the fridge is running.
How much charge is going into my battery - With a battery charger (or alternator) connected to the SOURCE side and the aux battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the battery and accumulates the charge (Ah) and energy (Wh) into the battery.
What is the output of my solar panel - With a solar panel connected to the SOURCE side and solar regulator connected to the LOAD side, the Watt Meter shows the charging current into the regulator, the voltage and charging power at the solar panel and accumulates the charge (Ah) and energy (Wh) into the regulator.
How much charge is my solar panel putting into my battery - Now with a solar regulator connected to the SOURCE side and battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the regulator and accumulates the charge (Ah) and energy (Wh) into the battery.
Specification:
English Manual please click here
Package Includes:
1x 130A High Precision Battery Watt Meter And Power Analyzer
How Much Power Does my Fridge Use - with the Battery connected to the SOURCE side and Car Fridge (or other accessory) connected to the LOAD side. The Watt Meter shows the current into the Fridge, voltage and power at the battery and accumulates the Ah and Wh while the fridge is running.
How much charge is going into my battery - With a battery charger (or alternator) connected to the SOURCE side and the aux battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the battery and accumulates the charge (Ah) and energy (Wh) into the battery.
What is the output of my solar panel - With a solar panel connected to the SOURCE side and solar regulator connected to the LOAD side, the Watt Meter shows the charging current into the regulator, the voltage and charging power at the solar panel and accumulates the charge (Ah) and energy (Wh) into the regulator.
How much charge is my solar panel putting into my battery - Now with a solar regulator connected to the SOURCE side and battery connected to the LOAD side, the Watt Meter shows the charging current into the battery, the voltage and charging power at the regulator and accumulates the charge (Ah) and energy (Wh) into the battery.
Specification:
| Item Name | Watt Meter and Power Analyzer |
| Item NO. | FT08 |
| Operation Voltage | 4.8V-60V |
| Measures Range | 0-130A, resolution 0.01A; 0-60V, resolution 0.01v; 0-6554W, resolution 0.1w; 0-65Ah,resolution 0.001An; 0-6441Wh,resolution 0.1Wh; |
| LCD | 16 x 2, backlit LCD display |
| Size | 85 mm x 43 mm x 25 mm (3.35 in x 1.69 in x 0.98 in) |
| Weight | 82g |
| Color | Black |
English Manual please click here
Package Includes:
1x 130A High Precision Battery Watt Meter And Power Analyzer
We found this little unit great to measure our incoming solar power versus outgoing battery load on a second unit
Geekcreit® 100A 22000W Power Monitor Module AC Meter Panel 45-65Hz Test Voltage AC 80-260V (2C3 AC power meter)
Note:
1. This module is suitable for indoor use only.
2. Applied load can not exceed the rated power.
3. The wiring order can not be wrong.
4. This is an entry level measuring solution. Do not expect 100% accuracy.
4. This is an entry level measuring solution. Do not expect 100% accuracy.
Specifications:
Apply to power grid voltage range: 110V-220V
Working voltage: 80 ~ 260VAC
Test voltage: 80 ~ 260VAC
Rated power: 100A / 22000W
Working Frequency: 45-65Hz
Measurement accuracy: 1.0 (Error 1%)
Dimensions of LED display screen: 51 x 30mm
Dimensions of LED display screen: 51 x 30mm
Features:
Network voltage direct power supply, no external power supply needed, measurement precision, large-screen LCD liquid crystal screen display clearly.
A. Function
1. electrical parameter measurement function (voltage, current, active power, power).
2. overload alarm function (over power alarm threshold, the backlight and power flicker tips).
3. The power alarm threshold preset function (can set up their own power alarm threshold).
4. Power button clear function.
5. Power-down data storage function.
6. Large-screen LCD screen full display function (display voltage, current, active power, power).
7. Backlight.
B. Display and key
Display voltage, current, power, energy parameters from the large-screen LCD screen simultaneously.
Display Format
1. Power: measurement range 0 ~ 22kW
1kW display format within 0.0 ~ 999.9W;
From 1kW display format 1000 ~ 9999W;
10kW above the display format 10.0 ~ 22.0kW.
2. Power: measurement range 0 ~ 9999kWh
10kWh within the display format 0 ~ 9999Wh;
Above 10kWh display format 10 ~ 9999kWh;
3. Voltage: Test Range 80 ~ 260V
Display Format 80 ~ 220V
4. Current: Test Range 0 ~ 100A
Display Format 0.00 ~ 99.99A.
Package includes:
1 x 100A Power Monitor Module AC Meter Panel
1 x CT
FAQ
Why is the test data wrong? Voltage * Current = Power, But power is less than the actual test voltage * Current, Why is that?
Answer: There are three types of power:
Active Power (P represents / unit W)
Reactive power (Q represents / unit Var)
Apparent power (S represents / unit VA)
Here we only talk about Active Power, for others, please google it:
P = U * I * cosφ, cosφ it represents the power factor, purely resistive load (Such as incandescent, heater, etc.) the power factor is generally close to 1,Between the inductive and capacitive load load power factor 0-1. So purely resistive load test time, P is substantially equal to or close to U * I. When Inductive or capacitive load test (Such as refrigerators, washing machines, televisions, computers, etc.) P<U*I, As for how much to keep the power factor related to the specific, Different for each appliance power factor.
1 x CT
FAQ
Why is the test data wrong? Voltage * Current = Power, But power is less than the actual test voltage * Current, Why is that?
Answer: There are three types of power:
Active Power (P represents / unit W)
Reactive power (Q represents / unit Var)
Apparent power (S represents / unit VA)
Here we only talk about Active Power, for others, please google it:
P = U * I * cosφ, cosφ it represents the power factor, purely resistive load (Such as incandescent, heater, etc.) the power factor is generally close to 1,Between the inductive and capacitive load load power factor 0-1. So purely resistive load test time, P is substantially equal to or close to U * I. When Inductive or capacitive load test (Such as refrigerators, washing machines, televisions, computers, etc.) P<U*I, As for how much to keep the power factor related to the specific, Different for each appliance power factor.
DC 0-100V 10A Digital Voltmeter Ammeter Dual Display Gauge 0.28" Red Blue LED (1A4 volt/amp meter)
Description
- Voltage 0.0V to 100V
- Current 0A to 10A
- Working voltage DC 4 to 30V
- Working current <20mA
- Size 48mm x 29mm x 22mm
12V Lead Acid Battery Digital Charge Level Indicator (2C3 battery meter digital)
Description:
Charge Level Red Indicator Voltmeter Precise for 12V Lead-acid Battery
1. Working current:5-15mA
2. Eight electricity Level Resolution:10% 25% 40% 50% 60% 75% 90% 100%
3. Voltmeter accuracy:1%
4. Working temperature: -10 ~ +65 Celsius
5. Operating Humidity: 10 ~ 80%
6. Dimensions: 48mm x 29mm x 22mm
Indicator:
Battery voltage is greater than 11.1V, 1 led indicator is lit.
Battery voltage is greater than 11.3V, 2 led indicator is lit.
Battery voltage is greater than 11.6V, 3 led indicator is lit.
Battery voltage is greater than 11.9V, 4 led indicator is lit.
Battery voltage is greater than 12.2V, 5 led indicator is lit.
Battery voltage is greater than 12.5V, 6 led indicator is lit.
Battery voltage is greater than 12.9V, 7 led indicator is lit.
Battery voltage is greater than 13.3V, 8 led indicator is lit.
Package Includes:
1 x lead acid LED indicator battery capacity tester voltmeter 12V
Charge Level Red Indicator Voltmeter Precise for 12V Lead-acid Battery
1. Working current:5-15mA
2. Eight electricity Level Resolution:10% 25% 40% 50% 60% 75% 90% 100%
3. Voltmeter accuracy:1%
4. Working temperature: -10 ~ +65 Celsius
5. Operating Humidity: 10 ~ 80%
6. Dimensions: 48mm x 29mm x 22mm
Indicator:
Battery voltage is greater than 11.1V, 1 led indicator is lit.
Battery voltage is greater than 11.3V, 2 led indicator is lit.
Battery voltage is greater than 11.6V, 3 led indicator is lit.
Battery voltage is greater than 11.9V, 4 led indicator is lit.
Battery voltage is greater than 12.2V, 5 led indicator is lit.
Battery voltage is greater than 12.5V, 6 led indicator is lit.
Battery voltage is greater than 12.9V, 7 led indicator is lit.
Battery voltage is greater than 13.3V, 8 led indicator is lit.
Package Includes:
1 x lead acid LED indicator battery capacity tester voltmeter 12V
- 1