Simple operation with only two knobs and a pushbutton.

 

Ground Effect Rejection VLF eliminates annoying or false signals from wet ground foliage, pavement or mineralized ground.

 

Identifies metallic objects by speaker sound and needle movement.

 

High sensitivity for maximum penetration through soil, asphalt or concrete.

 

Pushbutton tuning.

 

Built-in battery test.

 

Shaft length is adjustable and locks in position.

 

Fully waterproof seach coil.

 

Ultra-slow Auto-tune to stabilize ground tuning and minimize frequency drift.

 

The M-97-8 Valve, Pedestal and Box Locator is specifically designed for finding buried or paved-over valves, boxes or vaults.  It also locates buried survery markers, water or gas meters, conduit, manholes and other metal objects.

 

Pushbutton tuning makes for quick and easy maintenance of the meter level and the "thres-hold level of the sound.  The "threshold" level is a low tone heard during normal operation when the M-97-8 is correctly tuned to existing ground and temperature conditions.  Push button tuning also allows the operator to "detune" the M-97-8 for pinpointing the location of buried or covered metallic objects.  Special auto-tune circuitry provides a continual, but very gradual retuning of the M-97-8 operating frequency to counteract any drift caused by temperature and humidity changes.

 

 

Operating Frequency:   4.5 kHz 5

Sensitivity:                    0.2mV RMS for full scale

Sensitivity Adjustment:  12:1

Output Indication:         Meter:  1mA, 0-100 linear scale

                                    Speaker:  16 ohm impedance

                                    Headset:  8 ohm impedance

                                    Audio Frequency:  450 kHz

Power Supply:              +/- 9 V supplies; (12) 1.5V AA batteries in (2) 6 battery packs.

Battery Life:                  Alkaline:  100 + hours

                                    Carbon Zinc:  35 to 45 hours

Power Consumption:    13.8 mA

Dimensions:                  40 to 54 inch adjustable  (101 to 137 cm)

Weight:                         w/8 inch coil:  3.7 lbs (1.7 kg)

                                     w/11 inch coil:  4.3 lbs (1.9kg)

 

(Shipping can take up to 2.5 weeks for this item)