Keller LEO 1 Digital Manometer

Introduction – Keller LEO 1 Digital Manometer

The Keller LEO 1 Digital Manometer is a high-accuracy portable pressure gauge designed for applications requiring fast pressure peak detection and reliable digital measurement. Equipped with an insulated piezoresistive pressure sensor and a microprocessor-based acquisition system, it delivers precision readings across a wide selection of pressure ranges from –1…3 bar up to 0…1000 bar. Its robust construction, long battery life, and versatility make it suitable for demanding industrial and service environments.

With its rapid measurement mode of ≥1000 readings per second, the LEO 1 is engineered to detect dynamic pressure spikes and transient events that conventional gauges often miss. This capability ensures dependable data when analyzing pump performance, hydraulic systems, or fluid technology processes. The integrated Min/Max function allows technicians to view the highest and lowest recorded values instantly, supporting accurate diagnostics and system tuning.

The device is built for field reliability, featuring an IP65-rated housing, stainless steel wetted parts, and operating ranges suitable for harsh industrial conditions. Its clear dual-row LCD ensures easy readability, while selectable pressure units support flexible operation across global applications. Dubai Sensor frequently supplies the LEO 1 for industrial projects across the UAE and broader MENA region due to its proven performance and durability under local climatic and operational conditions.

For hazardous locations, the LEO1-Ei variant offers ATEX and IECEx certified intrinsic safety, ensuring compliance with international standards for explosive atmospheres. This makes the device suitable for oil & gas, petrochemical plants, and high-risk industrial zones common in the region.

Key Features & Benefits

• High accuracy: ±0.1% FS at room temperature
  
• Total error band: ±0.2% FS (0–50°C)
  
• Fast peak detection with ≥1000 measurements per second
  
• Wide pressure range options up to 1000 bar
  
• Long battery life: up to 1000 hours in standard mode
  
• IP65 protection for industrial environments
  
• Min/Max display for immediate pressure peak review
  
• Selectable pressure units (bar, mbar, hPa, kPa, MPa, PSI, kp/cm²)
  
• Zero calibration and automatic shutdown functions
  
• Intrinsically safe LEO1-Ei version for hazardous zones (ATEX/IECEx)
  

Technical Specifications – Keller LEO 1 Digital Manometer

Pressure Ranges

Performance

• Accuracy (20–25°C): ≤ ±0.1% FS
  
• Total error band (0–50°C): ≤ ±0.2% FS
  
• Long-term stability: ±0.2% FS/year
  
• Position dependency: ±1.5 mbar
  
• Pressure reserve: ≥ ±10%
  

Measurement & Display

• LCD, 2 rows × 4.5 digits
  
• Display interval: 2/s
  
• Standard mode: 2/s
  
• Peak mode: ≥1000/s
  
• Pressure + Min/Max display
  
• Configurable units: bar, mbar, hPa, kPa, MPa, PSI, kp/cm²
  

Mechanical

• Pressure connections: G1/4 male or 1/4-NPT male
  
• Materials (≤400 bar): AISI 316L
  
• Materials (>400 bar): AISI 318LN / 1.4462
  
• Diaphragm: AISI 316L
  
• Seal: FKM
  
• Housing: Faradex AS-1003
  
• Filling fluid: Silicone oil
  

Dimensions & Weight

• Without cover: 76×113×48 mm, ~220 g
  
• With cover: 85×118×52 mm
  

Environmental

• Medium temp: –40…85°C
  
• Ambient temp: –10…60°C
  
• Storage: –20…70°C
  
• IP65 protection
  

Standards & Certifications

Electromagnetic Compatibility

Complies with:

• EN IEC 61326-1
  
• EN IEC 61326-2-3
  
• EN IEC 61000-6-1 / –2 / –3 / –4
  

Intrinsic Safety (LEO1-Ei Version)

• ATEX: LCIE 01 ATEX 6001 X
  
• IECEx: IECEx LCIE 18.0035 X
  
• Classification: Ex II 1G Ex ia IIC T5 Ga
  
• Ambient temperature (Ei): –10…80°C
  
• Only Renata CR2430 battery allowed
  

Applications & Industries

• HVAC service and diagnostics
  
• Hydraulic and fluid power systems
  
• Pump performance evaluation
  
• Calibration pumps and test benches
  
• Pressure surge and spike monitoring
  
• Industrial maintenance and troubleshooting
  

Common usage across UAE/MENA includes:

• Oil & gas field service
  
• Building maintenance
  
• Industrial utilities
  
• Water treatment and pumping stations
  

Installation, Commissioning & Maintenance

• Select the appropriate G1/4 or 1/4-NPT connection based on system requirements.
  
• Install vertically with the pressure port facing downward to maintain calibration accuracy (as factory calibrated).
  
• Ensure seals and fittings match the process fluid compatibility.
  
• For hazardous areas, only use the LEO1-Ei and the approved Renata CR2430 battery.
  
• Replace battery when low-power indication appears; typical lifetime is 1000 hours (standard mode).
  
• For optimal performance, operate within the readability temperature range (10–50°C).
  

Why Choose Keller LEO 1 Digital Manometer

The Keller LEO 1 provides a precise, portable, and durable solution for field technicians who require fast and reliable pressure monitoring. Its rapid peak-detection capability and industrial-grade stainless steel construction make it ideal for demanding applications where safety and accuracy are critical.

Backed by Keller’s engineering expertise and supported regionally by suppliers such as Dubai Sensor, the LEO 1 offers long-term reliability, excellent measurement stability, and dependable performance under diverse environmental and operational conditions.

Ordering Guide

1. Select required pressure range (relative or absolute).
   
2. Choose preferred pressure connection (G1/4 or 1/4-NPT).
   
3. Decide whether you need the standard LEO 1 or the LEO1-Ei intrinsically safe version.
   
4. Add optional accessories:
   
   • Rubber protective cover
     
   • Calibration certificate (5-point, 11-point, or accredited DAkkS/SAS)
     
5. Confirm chemical compatibility of wetted materials (AISI 316L / AISI 318LN).
   
6. Place order through your supplier; Dubai Sensor is an official regional distributor.

FAQ – Keller LEO 1 Digital Manometer

What is the measurement accuracy of the Keller LEO 1?

The accuracy at room temperature (20–25°C) is ±0.1% FS, and the total error band over 0–50°C is ±0.2% FS.

How fast can the LEO 1 measure pressure peaks?

In peak mode, the device samples at ≥1000 measurements per second, allowing detection of fast pressure spikes and surges.

What pressure ranges are available?

The LEO 1 is available from –1…3 bar up to 0…1000 bar, with both relative and absolute pressure ranges depending on the model.

What is the battery life?

Up to 1000 hours in standard mode

Up to 150 hours in peak mode

Is there a version for hazardous areas?

Yes. The LEO1-Ei is an intrinsically safe version certified under ATEX and IECEx (Ex II 1G Ex ia IIC T5 Ga). It must use a Renata CR2430 battery.

What pressure connections are available?

Standard options include G1/4 male and 1/4-NPT male connections for both ≤400 bar and >400 bar variants.

What materials are used for the wetted parts?

Up to 400 bar: AISI 316L stainless steel

Above 400 bar: AISI 318LN / 1.4462 stainless steel

What is the protection rating of the device?

The LEO 1 is rated IP65, offering protection against dust and low-pressure water jets.

What is included with the LEO 1 upon delivery?

A plastic case, Renata CR2430 battery, and operating instructions are included.

What accessories are available?

Optional accessories include a rubber protective cover and calibration certificates (5-point, 11-point, DAkkS/SAS accredited).