Connect Your Flow Sensor to Any Data Logger Buy Now

Pulse to Voltage Translator

Pulse to Voltage Converter

0V to 3V Output, Linear with Pulse Rate

Low Cost, and Low Power

Choose From 4 Pulse Rate Ranges

Easy Verification with LED that Flashes on Each Pulse

Rugged, Easy to Mount Case (Optional)

Reads Pulses Rates Up To 1000Hz

Pulse to Voltage Translator Features

  • Allows you to connect any flow sensor to a data logger.
  • Linearly translates pulses to a voltage range of 0 to 3V.
  • Easily integrates with our VegeHub WiFi Sensor Hub.
  • Low cost.
  • Low power.
  • Is easy to trouble shoot systems with an LED that flashes with each input pulse.
  • Can be configured for 4 different pulse ranges for maximum resolution.
  • Optionally can be paired with a rugged and easy to mount case. (Sold separately.)
  • Reads pulse rates up to 1000Hz.

Pulse to Voltage Translator Applications

  • Crop Steering.
  • Interface flow sensors, and wind sensors to low cost data loggers.
  • Interface pulse output tachometers to any data logger.
  • Detect expensive water system leaks and get alerts.
  • Monitor water flow via WiFi.
  • Get real time data on water costs.
  • Greenhouse Automation.

Pulse to Voltage Translator Details

Our pulse to voltage translator allows you to easily connect flow sensors, and wind sensors to any data logger. This saves you money, because you can use low cost loggers, that don't have pulse inputs.

The translator has an internal pull up resistor on its input line, and will accept pulses from all sensors that have pulsed open drain/collector outputs.

We've made it easy to verify your flow sensor is working. The LED pulses whenever it receives 20 input pulses for quick visible verification.

Optimized for Linearity and Resolution

The translator will convert pulse rates from 0 to 1000Hz linearly to a voltage range of 0 to 3V. There are 4 pulse frequency ranges that can be selected with an internal jumper:

  • 0 to 125Hz.
  • 0 to 250Hz.
  • 0 to 500Hz.
  • 0 to 1000Hz.
You select the range based on the maximum pulse rate that your flow sensor can generate. The ranges allow greater resolution, especially for lower pulse rate systems.

Vegetronix Modular Building Blocks

We take a modular approach with our product lines. Each product is simple and low cost, and will easily interface to all of our other products. This approach allows you to build any type of application from our basic set of components.

Get Emails and Text Alerts

When used with our WiFi Sensor Hub you can get email or text notifications of leaks, or unexpected water usage as indicated by your flow sensors.

Optional Easy to Mount Enclosure

To keep the cost low, we sell the board by itself, or you can optionally pair it with an enclosure. The enclosure is made of 3D printed PLA. The top part is of the case is transparent, enabling you to see the internal LED. The bottom part has flanges with mounting holes, making it easy to mount.

You can purchase the case from us for minimal cost, or 3D print your own enclosure, by downloading the VG-PULSE-TRANS-CASE STL files and printing the case yourself.

Need a 4-20mA Current Loop Output?

Drawing under 1mA it can easily be paired with our current loop translator, which transforms any voltage output device into a current loop output device. Because it draws under 4 mA, it can be loop powered. If your flow rate sensor brings the total current draw above 4mA you can still use the current loop translator, but you will need to power it from an external source, rather than the current loop.

We Want you to be Happy

Ordering is easy and low risk. Since we build our own products at our factory, all of our products are in stock. When you place your order from our website, it will ship same day from our factory, and you'll have it in your hands in just a couple of days. We ship to nearly EVERY COUNTRY in the world.

If you aren't amazed and delighted by your new Pulse to Voltage Translator, return it for a refund within 30 days.

Pulse Rate to Voltage Translator

Pulse to Voltage Translator with Case. (Case is sold separately)

Pulse Rate to Voltage Translator Functional Diagram

Pulse to Voltage Translator Functional Diagram.

VG-PULSE-TRANS - Pulse to Voltage Translator Ordering Info

We ship to nearly EVERY COUNTRY on the planet, directly to you from our factory.

99% of orders ship same day.

Part Number Description Price Purchase
VG-PULSE-TRANS Pulse to Voltage Translator Board Buy Now
VG-PULSE-TRANS-CASE Plastic Enclosure for the Pulse to Voltage Translator Board Buy Now

Contact us for volume pricing information.

Pulse to Voltage Translator - Specifications

Input Voltage 3.5VDC to 24VDC
Maximum Power 3 mW
Current Consumption at 6V 0.9 mA
Board Dimensions 25.4mm x 31.75mm (1" x 1.25")
Enclosure Dimensions See drawing below.
Operational temperature -40°C to 85°C
Maximum Input Pulse Range 1000Hz
Output Range 0 to 3V
Output Resistance 10K Ohms
Input Pull-up Resistance 10K Ohms
Enclosure Material Environmentally friendly PLA.

Pulse to Voltage Translator Dimensions


Wiring Tables

WARNING! Do not reverse the order of the wires on the flow sensor, if you do it will likely destroy the flow sensor.

Terminal Block: TB1 (VOLT OUT)
Pin Number Label Description
1 (Square Solder Pad) V+ Power In. Connect to the logger's output power line. Receives power from the logger or battery.
2 VOUT Voltage Output. Connect to logger input.
3 GND Ground. Connect to ground of logger, or negative voltage of battery.

Terminal Block: TB2 (PULSE INPUT)
Pin Number Label Description
1 (Square Solder Pad) GND Ground. Connect to ground (black wire) of flow sensor
2 PULSE Pulse In. Connect to pulse output (yellow wire) of flow sensor.
3 V+ Power Out. Connect to the power input (red wire) of flow sensor.

Pulse to Voltage Translator - Configuring the Frequency Range Jumper

To configure the translator you will need to figure out the maximum pulse rate of your flow sensor in Hz. Set the range jumper to the closest setting that is higher than this value. The sensor's data sheet should tell you the maximum pulse rate.

In the case of flow sensors, most sensors have specify the pulse rate as a factor of flow in the following form:

freq(hz)= K*Q + B.
where Q is the flow rate, normally in liters/min,
and K is a scaling factor, and B is an offset.

For example if your sensor has a maximum flow rate of 30 liters/min, and a scaling factor of 11. Then your maximum pulse rate would be 330Hz (30*11), and you would use the range setting specified by 500Hz, as this is the next highest value above 330Hz.

Pulse to Voltage Translator - How to Figure out the Transform Equation for Vegecloud for Flow Sensors.

If you are connecting your flow sensors to a VegeHub wifi logger and sending the data to Vegecloud. You'll need to specify a transform to convert the voltage from the pulse translator to units of flow, such as liters/second. We'll take you through the math, so you know how to do it yourself, and then provide a table for some of the flow sensors that we carry.

Flow sensor indicate the flow rate in Liters/second by generating pulses. The faster the flow, the faster the pulse rate in Hz. The form of the Frequency to flow equation is Q= aF+b, where Q is flow rate, F is frequency, and b is an offset. Each flow sensor has a different equation.

The pulse trans converts pulses to a voltage. It has an equation of the form: F= Rmax*Vp/3V, where Rmax is the max frequency of the particular frequency range you've selected with the range jumper, and Vp is the voltage out of the pulse translator. The 3V is due to the fact that the maximum voltage out is 3V.

So we need to combine these two equations into a single equation that we can enter into vegecloud so it can convert the voltage that is reported by the hub back to a transform equation, that will give us a result as a flow rate as a function of Voltage Vp.

We substitute the equation: Rmax*Vp/3V into the equation Q= aF+b, and get:

Q= a*Rmax*Vp/3V + b

Now so that you don't need to go through the math yourself, we've created a table of vegecloud transforms for each of the flow sensors that we carry.

Flow Sensor Equations. Assumes 0 to 125Hz Range Jumper. Vp is the Output Voltage From the VG-PULSE-TRANS
Flow Sensor Flow Equation(L/min) Flow Equation(G/min) Vegecloud Transform Equation (L/min) Vegecloud Transform Equation (Gallons/min)
VG-FLOW-0_5 Q= F/11 Q= F/41.6 Q= 3.78*Vp Q= 1.00*Vp
VG-FLOW-0_75 Q= F/6.6 Q= F/25 Q= 6.31*Vp Q= 1.666*Vp
VG-FLOW-1_0 Q= 0.166*F + 1.333 Q= 0.044*F + 0.352 Q= 6.944*Vp + 1.333 Q= 1.833*Vp + 0.352

Wiring Diagram - Flow Sensor to VegeHub

WARNING! Do not reverse the order of the wires on the flow sensor, if you do it will likely destroy the flow sensor.

Connection of Flow Sensor to WiFi Hub

The VG-PULSE-TRANS can be used to connect a flow sensor to a VegeHub WiFi Sensor Hub

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