The Delmhorst Navigator Pro is a 3-in-1 moisture meter for restoration work: pin mode, pinless scan mode and a thermo-hygrometer. What sets it apart from the rest of the range is how it organises what you find.
Readings are structured by job and room. Up to five jobs with unique job IDs, up to 32 rooms per job, and 1,400 stored readings stamped with date, time, room and location. Downloaded to a PC, that becomes an Excel report showing a structure drying over time rather than a list of numbers.
It reads moisture in drywall, insulation, timber, concrete and plaster, and is used to trace leaks and locate dry rot.
What is in this package
- Navigator Pro meter
- RHT-S1 humidity sensor
- Carrying case
- 2-E electrode
- PC kit with application software
Specifications
| Pin mode | 5% to 60% wood; 0.1% to 6% drywall; 0 to 100 reference scale |
| Scan mode | 0 to 300 numerical reference scale |
| Thermo-hygrometer | Temperature and RH, fast response |
| Calculates | Dew point and grains per pound |
| Storage | 1,400 readings with date, time, room and location stamp |
| Job structure | Up to 5 jobs, up to 32 rooms per job |
| Download | Optional software exports to Excel |
| Size | 216 × 86 × 44 mm |
| Weight | 312 g |
| Power | 9 V battery |
| Warranty | 1 year |
Two modes of operation: Basic Mode simplifies the menus for straightforward work, Enhanced Mode opens the job and room structure. Most operators start in Basic and move across once they are documenting jobs.
Relative humidity and ASTM F-2170
The Navigator Pro conforms to ASTM F-2170, the in-situ relative humidity test for concrete slabs, and the manual carries a dedicated procedure for it. The RH/T-S3 sensor is required.
This Basic Package ships with the RH/T-S1 ambient sensor, which reads air temperature and humidity for drying records and psychrometrics. For slab testing you also need the RH/T-S3 in-situ sensor, which we stock separately and which can be added at any time.
The distinction matters. A pin or scan reading tells you about moisture at or near the surface. In-situ RH tells you what the slab will do once a floor covering traps the moisture in it — and that is the number flooring manufacturers write their requirements against.
Choosing between the Delmhorst multi-mode meters
Four meters cover this ground and they separate on three things: how many measurement modes, whether the meter stores and exports readings, and whether it measures relative humidity.
| Meter | Modes | Stores readings | Suits |
| TechCheck Plus | Pin and scan | No | Two-mode work without RH. Freezes a reading taken out of sight. |
| QuickNav | Pin, scan, RH | No | Full 3-in-1 capability where you record readings yourself. |
| TotalCheck | Pin, scan, RH | Up to 1,400 with date and time stamp | Documented drying records, job groupings, PC download. |
| Navigator Pro | Pin, scan, RH | Yes, with job and room structure | Restoration work needing readings organised by room and exported. |
The honest short version. If you do not need to store and download readings, the QuickNav does the same measuring as the Navigator Pro for considerably less — Delmhorst say so themselves. If your work is insurance-backed or you are handing over drying records, storage stops being a luxury and the TotalCheck or Navigator Pro earns the difference.
All four take the same external electrodes, so a 21-E or 26-ES bought with one meter carries across to the next.
Frequently asked questions
What does 3-in-1 actually mean?
Pin mode for quantitative moisture content at a known depth, scan mode for finding moisture without marking a surface, and a thermo-hygrometer for air temperature and relative humidity. Three instruments in one body, so you are not carrying three.
Do I need storage?
Only if you have to prove what you found. On insurance and warranty work, a dated set of readings organised by room is what supports the claim. On maintenance work where you act on the reading and move on, storage is weight you are paying for.
Can I add electrodes later?
Yes. All Delmhorst electrodes fit all current Delmhorst meters. The 21-E reads inside wall cavities and the 26-ES drives into timber flooring with insulated pins.
Is scan mode a moisture content reading?
No. Scan mode gives a 0 to 300 relative reference, not a percentage. Use it to find where the moisture is, then pin the area to get a number you can defend.
Who supports the meter in Australia?
We do. Carpet Cleaners Warehouse is the exclusive Australian distributor for Delmhorst outside the agricultural sector, and we hold electrodes, pins and sleeves in stock.
Support and warranty
Carpet Cleaners Warehouse is the exclusive Australian distributor for Delmhorst outside the agricultural sector. Service, calibration questions and warranty claims are handled here rather than sent overseas, and we hold electrodes and pins in stock.
Two year warranty on manufacturing defects. This does not exclude, restrict or modify your rights under the Australian Consumer Law. Our goods come with guarantees that cannot be excluded under the ACL. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage.
From the workshop
[Technician’s Note — replace before publishing: two to four sentences of first-hand CCW field experience relevant to this product. A pattern you see, a mistake customers make, or something learned from servicing or selling it. Not spec repetition, not a sales pitch, not invented.]
Documents
Not sure which package or electrode suits your work? Tell us what you are reading — timber floors, wall cavities, concrete, cladding — and we will tell you what you actually need. More in Moisture Meters.
