ADT681A digital pressure gauge. Close-up of a gauge pressure device, optional absolute, with a digital display and various function buttons.

ADT681A Digital Pressure Gauge - Barometric Pressure - Image 2

ADT681A Digital Pressure Gauge – Barometric Pressure

Pressure Type:

Gauge Pressure | Compound Pressure | Differential Pressure | Barometric Pressure

SKU: ADT681A-BP

Pressure Range

Accuracy

Thread or Connection

Datalogging

Clear

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Additel’s 681A Series Digital Pressure Gauges are designed to be your favorite tool for a wide range of pressure measurement and calibration applications. With features such as datalogging and Bluetooth technology included, you will find these gauges to be high in value at a reasonable cost. These durable IP67 rated gauges have been built with outdoor elements in mind and are the perfect fit for field work as well as in the laboratory.

Durable:

The IP67 rating ensures that dusty and wet environments won’t hamper this gauges ability to perform while the shock and vibration resistance (5g vibration 10g shock) coupled with the corrosion resistant wetted parts help to protect the inner workings of these durable Additel gauges.

ADT685 digital pressure gauge submerged in water. Gauge pressure displayed on the screen. Stainless steel casing, rugged design.

Easy to Use:

The display is clear in bright sunlight, and the backlight can be turned on with a one-button press for use in low light situations. The pressure value can be displayed in large fonts and can be read from a few meters away, making this gauge the perfect device for no-nonsense measurement, calibration and verification work.

Additel digital pressure gauge with Bluetooth, showing pressure readings on both the gauge and a smartphone app. Wireless pressure measurement.

Easy to Maintain:

Designed with membrane buttons, making them easy to clean and maintain over time, which can simply be wiped clean for quick and simple cleaning. Coupled with the extra-long battery life of these easy-to-use gauges, you will find that maintenance is minimal and infrequent.

Every model measures Gauge or Absolute Pressure:

The Additel 681A Digital Pressure Gauges contain a built-in barometer sensor which allows for the pressure reading to display in gauge pressure or absolute pressure with a simple menu selection. The built-in barometer is calibrated and certified to an accuracy of 55 Pa.

Go to IECEx Intrinsically Safe Versions

The ADT681A is an upgrade to the original ADT681 gauge. With more data storage, battery life, communication options, and IECEx certified model and a stainless steel casing, the ADT681A is built to last in almost any environment.

+/- 55 Pa or +/- 22 Pa Accuracy
6 Digit Resolution
Up to 10,000,000 records
Built-in Barometric Sensor
Measures Absolute or Gauge Pressure
USB, RS232, and Bluetooth Communication
External Power Support or up to 4,000 hour battery life
IECEx Certified Model Available (ADT681AEx)
304 Stainless Steel and IP67 Rated

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Digital pressure gauges are highly versatile instruments used across a wide range of industries where precision and reliability are essential. Common applications include:

Manufacturing: Monitoring and controlling pneumatic and hydraulic systems to ensure consistent process performance.

Automotive: Testing and servicing vehicle systems that rely on accurate pressure measurement for safety and efficiency.

Environmental Monitoring: Tracking atmospheric, gas, or water pressure to support environmental assessments and research.

Mining, Process, and Power Industries: Testing, calibrating, and data logging of pressure systems in demanding industrial environments.

Calibration: Serving as high-accuracy reference equipment for verifying and maintaining the performance of other pressure measurement devices.

Feature	ADT681A	ADT680A	ADT680P	ADT601Ex	ADT685	ADT686	ADT673
Gauge Pressure	•	•	•	•	•	•	•
Compound Pressure	•	•	•		•	•	•
Absolute Pressure	•				•	•	•
Differential Pressure	•				•	•	•
Range	-15 to 60K psi (-1 to 4200 bar)	-15 to 60K psi (-1 to 4200 bar)	-15 to 60K psi (-1 to 4200 bar)	-15 to 15K psi (-1 to 1000 bar)	-15 to 60K psi (-1 to 4200 bar)	-15 to 60K psi (-1 to 4200 bar)	-15 to 60K psi (-1 to 4200 bar)
Available Accuracies (range dependent)	0.02%, 0.05%, 0.1%, 0.2%FS & 0.1%RD	0.1%, 0.2%FS	0.02%, 0.05%, 0.1%, 0.2%FS & 0.1%RD	0.5%FS	0.02%, 0.05%, 0.1%, 0.2%FS & 0.1%RD	0.02%, 0.05%, 0.1%, 0.2%FS & 0.1%RD	0.02%, 0.05%, 0.1%, 0.2%FS & 0.1%RD
Digital Display	•	•	•	•	•	•	•
Analog Display (Fan-Shaped Indication)	•				•
Fully Temperature Compensation from -10°C to 50°C	•	•	•	-20 to 50°C	•	•	•
Resolution	5, 6 digits	4, 5 digits	4, 5 digits	4 digits	5 1/2 digits	4, 5, 6 digits	4, 5, 6 digits
Selectable Pressure Units	12 & 1 customized units	12 & 1 customized units	12 & 1 customized units	12	11 & 3 customized units	11 & 5 customizable units	11 & 5 customizable units
Backlight	•	•	•	•	•	•	•
Over Pressure Indication	•	•	•	•	•	•	•
IP67	•	•	•	•	•	•	•
Intrinsically Safe	ADT681AEx	ADT680AEx	ADT680PEx	•	ADT685Ex
Communication	BLE, USB, RS232	BLE, RS232	BLE, RS232	BLE	BLE, USB, RS232, RS485(optional)	BLE, USB, RS232, RS485, WIFI(optional)	BLE, USB, RS232, RS485, WIFI(optional)
Data Logging	•	•	•		•	•	•
Min/Max	•	•	•	•	•	•	•
Built-in Leak Test	•				•	•	•
HART							•
Measure mA and V							•
24V Loop Power							•
Switch Test							•
NIST-Traceable Certificate of Calibration	•	•	•	•	•	•	•
Power	3 AA Alkaline batteries (power supply through USB is optional, adapter not for Ex)	3 AA Alkaline batteries (External power supply through RS232 cable, adapter not for Ex)	3 AA Alkaline batteries (External power supply through RS232 cable, adapter not for Ex)	3 AA batteries	3 AA batteries & 120/220V adapter is optional(adapter not for Ex)	Rechargeable battery (120/220V adapter is optional)	Rechargeable battery (120/220V adapter is optional)