Product Overview
Extech MO290-PINS-HP replacement insulated pins for the Extech MO290-HP Moisture Hammer Probe, 4 cm Insulated Pins. Pack of 20 pins, each 4 cm (1.6 inch) long, with 2 lock nuts to secure pins to the probe.
Insulated Pins Read at the Tip
These are insulated except at the tip, so the meter reports moisture at the depth the pin has reached rather than the wettest point along its length. That is what makes a hammer probe useful — driving to two depths gives you the gradient, which tells you whether timber is dry or only dry at the surface.
Do not substitute uninsulated pins. They fit and they change what the reading means.
Specifications
| CCW SKU | EXMO290-PINS-HP |
| Model | Extech MO290-PINS-HP |
| Quantity | 20 pins |
| Pin length | 4 cm (1.6 inch) |
| Type | Insulated |
| Includes | 2 lock nuts |
| Fits | Extech MO290-HP hammer probe |
Frequently Asked Questions
How many pins are in the pack?
20, plus 2 lock nuts.
Can I use uninsulated pins?
No. They read along their whole length, not at the tip.
What we see in the field
If a hammer probe starts giving inconsistent readings, have a look at the pins before condemning the meter. Damaged insulation can change what part of the pin is actually measuring. Replace worn pins as a matched pair and check the probe for damage while it's apart.
Tell us your Extech model and we will confirm the part before you order.
