NanoSonde MPL4-33, Ø4.6 mm, 33kHz

NanoSonde MPL4-33 is Vesala’s new, world’s tiniest active sonde for small underground ducts. It is only 4.6 mm in diameter so it is optimal for calibrating 6 mm (inner diameter) fiber optic ducts and to locate their blockages, dents and other problems. MPL4-33 is flexible in the middle so it can navigate tight duct curves down to 170 mm radius.

MPL4-33 is intended to be used with cable tracers and pipe locators working on the 33 kHz tracing frequency.

How to calibrate micro ducts with MPL4-33

Before jetting, a suitable size shock absorber is attached to the sonde. It will protect the sonde if it hits an obstacle. After inserting a battery sonde is jetted into the duct. If sonde gets through the duct, duct is successfully calibrated. If sonde stops in the duct, it is located above ground using a cable tracer receiver. Knowing the exact spot of a blockage considerably saves time and reduces unnecessary digging costs.

MPL4-33 technical features

MPL4-33 turns on and starts sending tracing signal when a battery is inserted and the battery cap is attached. Typical tracing distance using CL43 receiver is 2.3 m. Replaceable lithium battery enables approx. 9 hours total usage time depending on ambient temperature. MPL4-33 diameter is 4.6 mm and length with battery cap 94 mm. Mounting thread for shock absorbers is M3.5 female. A shock absorber with 4.8 mm calibrator suitable for 6 mm ducts is included. 6.4 mm head for 8 mm ducts is also available.

Each set includes: 

• MPL4-33 Transmitter sonde with M3.5 mounting thread
• Spare battery cap
• Battery cap tool
• 3.0V lithium battery BR425, 2 pcs
• Shock absorber and 4.8mm calibrator IV343-48
• Plastic storage box SB4
• Quick guide