Description
Hohner Intrinsically Safe Flow Sensor DLS-011 (Dragon Flow Line Sensor)
The Hohner Intrinsically Safe Flow Sensor DLS-011 (Dragon Flow Line Sensor) is a high-precision, heavy-duty flow monitoring system engineered specifically for volatile oil & gas drilling operations and harsh industrial fluid processing. Certified for globally recognized hazardous locations including ATEX, IECEx, UKCA, and CSA Class I, Div 1 / Zone 0 environments, this sensor delivers continuous, reliable level and flow measurements for drilling mud, chemical fluids, and industrial effluents. Constructed from solid stainless steel, the DLS-00X withstands abrasive media, high pressures up to 5 bar, and intense mechanical stress in both open-trough and closed-pipe return lines.
Operating via a mechanical spring-tensioned paddle arm connected to a certified intrinsically safe shaft encoder, the DLS-00X translates up to 90 degrees of angular displacement directly into a proportional electronic output signal. Designed with field maintenance in mind, the device features an adjustable spring tension housing, customizable paddle sizes for various pipe diameters, and anti-seize hardware for rapid installation and service. Built-in terminal block access and rugged cable gland entries allow field technicians to wire and calibrate the unit safely without special tooling.
Key Features:
✅ Certifications: Ex h IIC T4 Ga, Ex ia IIC T4 Ga, Class I Div 1 Groups A, B, C, D (ATEX, IECEx, UKCA, CSA)
✅ Output Options: Available in 4–20mA Absolute Loop Powered or Foundation Fieldbus (FF) FISCO variants
✅ Rugged Ingress Protection: Heavy-duty IP65 / IP66 / IP67 rated stainless steel housing
✅ Versatile Connectivity: M16 or M20 terminal block gland options with internal IS junction connections
✅ Mechanical Deflection: Full 90° angular deflection span mapped to maximum output signal
✅ Pressure Rated: Pressure rated to 5 Bar minimum for sealed pipe configurations
✅ Flexible Power Options: Powered via standard intrinsically safe barriers or Class 2 power supplies 28V or 17.5V
✅ Customizable Tension: 3-position adjustable internal tension spring (15% Weaker, Neutral, 15% Stronger)
✅ Heavy-Duty Hardware: Solid stainless steel main block, base plate, shafting, and saddle mounting assembly
Hohner Intrinsically Safe Flow Sensor DLS-011 Technical Specifications:
| Feature | Details |
|---|---|
| Product Model | Hohner Intrinsically Safe Flow Sensor DLS-00X (Dragon Flow Line Sensor) |
| Output Options | 4–20mA Absolute Current Loop or Foundation Fieldbus (FF) |
| Hazardous Area Certifications | ATEX, IECEx, UKCA, CSA (Canada & US) |
| Ex Protection Markings | Ex h IIC T4 Ga, Ex ia IIC T4 Ga Class I Div 1 Groups A B C D, Zone 0 AEx ia IIC T4 |
| Ambient Operating Temperature | -20°C to +60°C (-40°C to +60°C for FF options) |
| Mechanical Deflection Span | 0° to 90° maximum angular displacement |
| Body & Shaft Material | Heavy-Duty Solid Stainless Steel (Aluminium option for FF encoder) |
| Pressure Rating | Minimum 5 Bar pressure rated |
| Ingress Protection | IP65 / IP66 / IP67 |
| Safety Entity Parameters (4-20mA) | Ui = 28V, Ii = 150mA, Pi = 0.76W, Ci = 12nF, Li = 0 |
| Safety Entity Parameters (FF) | Ui = 17.5V, Ii = 380mA, Pi = 5.32W, Ci = 2.2nF, Li = 2.2uH |
| Spring Tension Adjustment | 3 Positions (15% Weaker, Neutral, 15% Stronger) |
| Pipe / Trough Compatibility | Suitable for open trough return lines or closed pipes |
| Cable Entry Options | M16 or M20 Glands with internal DIN rail terminal blocks |
Certifications & Compliance:
🔗 ATEX Certificate
🔗 IECEx Certificate
🔗CSA Certificate: Class I, Div 1, Groups A, B, C, D T4; Class II, Div 1, Groups E, F; Class III T6; Zone 0 AEx ia IIC T4
🔗 Ingress Protection: Rated IP65, IP66, and IP67 for harsh outdoor washdown protection
🔗 Download Datasheet
Applications of Hohner Intrinsically Safe Flow Sensor DLS-011:
🔹 Oil & Gas Drilling Rigs (Mud Flow & Return Lines)
🔹 Chemical Processing Plants
🔹 Mining Operations & Slurry Lines
🔹 Industrial Laboratories & Test Benches
🔹 Heavy Manufacturing & Industrial Fluid Line Monitoring
What’s in the Box?
📦 1x Dragon Flow Line Sensor DLS-011
📦 1x Dragon Flow Line Sensor Saddle (Optional)
📦 3x Paddles (1x Small, 1x Medium, 1x Large)
📦 2x Tension Springs (1x Factory Fitted, 1x Spare)
📦 1x Tool & Hardware Kit
📦 1x Arm Handle
📦 2x Base Plate Gaskets (1x Standard, 1x Spare)
📦 Documentation & Installation Kit
Ordering & Shipping Details
📦 Lead Time: 3 – 4 weeks
📍 Shipping Terms: Worldwide / Expedited Options Available
💳 Payment Options: Credit Card, PayPal, Net 30 Terms
FAQs:
How does the DLS-011 measure mud flow?
As drilling fluid or mud moves through the return line, it deflects the paddle upwards. This angular movement (up to 90 degrees) rotates an internal shaft connected directly to an intrinsically safe encoder, translating fluid height/flow into an accurate electronic output signal.
Can I adjust the tension on the paddle arm in the field?
Yes, the spring housing features three adjustable slot positions (15% Weaker, Neutral, and 15% Stronger), allowing operators to fine-tune paddle response depending on fluid viscosity and flow rate.
What hazardous areas is this sensor approved for?
The DLS-00X is globally certified for ATEX, IECEx, UKCA, and CSA Class I Division 1 Groups A–D / Zone 0 hazardous locations, making it suitable for continuous gas and dust risk zones.
Are different paddle sizes included?
Yes, every kit includes small, medium, and large paddles, as well as multiple mounting height holes on the paddle arm, allowing field customization to match various pipe dimensions.
