The Miljoco-Weiss 25SD-160 is a light powered digital thermometer in a 1 in. x 4 in. surface mount case. It reads -40 to 160°F on a 3/8 in. LCD, runs on ambient light with no battery and no wiring, and uses a 5 ft remote sensor.
Overview
Miljoco-Weiss has been building light powered thermometers under patent 5,196,781 since 1992. The sensor is fully potted with a press-fit bulb stopper, which is the construction the manufacturer cites for wash-down food service work. The 25SD is the slim surface mount version, sized to sit on the face of a cabinet where there is no room to cut a panel opening.
Typical Applications
- Refrigerated cabinets and cases
- Food service equipment
- Walk-in coolers
- OEM equipment upgrades
Warranty
Miljoco-Weiss warrants this product to be free from material defects in material and workmanship for 12 months from date of shipment, per the published Miljoco-Weiss terms and conditions of sale. No product-specific warranty period is published in the documentation for this model, so the standard term applies.
Key Features
No battery, ever
The unit is light powered under patent 5,196,781. Nothing leaks, nothing dies in the cold and nothing has to be scheduled for replacement.
NSF accuracy for food zones
Built to the accuracy NSF requires for food zone applications, which is what gets it past a health inspection.
Slim 1 in. x 4 in. surface case
The horizontal case mounts flat on the face of a cabinet without cutting a panel opening.
Adjustable calibration
The reading can be trimmed in the field against an ice bath rather than swapped out.
Splash proof with gasket
Gasketed for wash-down areas, with black or white food grade gaskets offered.
Wide light range
Operates from 30 Lux up to 50,000 Lux, so it works in a dim walk-in and in direct sunlight.
Technical Specifications
| Specification | Value |
|---|---|
| Measurement Range | -40 to 160°F (-40 to 70°C), factory set |
| Accuracy | 1% of reading, ±1°F or ±0.5°C per the current Miljoco-Weiss solar thermometer page; ±2°F between -20 and +60°F for NSF food zone applications per the light powered NSF catalog. Both figures are published by the manufacturer. See the source note below. |
| Display | 3/8 in. LCD |
| Case | 1 in. x 4 in. surface mounting, black or white |
| Mounting | Horizontal wall mount |
| Power | Light powered. No batteries and no supply wiring. |
| Light Rating | 30 Lux to 50,000 Lux |
| Sensor Lead Length | 5 ft |
| Environment | Splash proof with gasket |
| Update Time | 10 seconds |
| Calibration | Adjustable |
| Listings | NSF accuracy for food zone applications |
| Patent | US Patent 5,196,781 |
Source Notes
Documentation
Related Products
Frequently Asked Questions
Does it need a battery or power supply?
Neither. It is light powered and runs from 30 Lux upward. There is nothing to wire and nothing to replace.
What is the temperature range?
-40 to 160°F, factory set. The catalog writes this as 40/0/160°F, which is the manufacturer notation for a range that crosses zero.
How long is the sensor lead?
5 ft on this part number. Longer sensor lengths are offered on the SD line.
Can the reading be recalibrated?
Yes. The SD line has adjustable calibration. Check it against a stirred ice bath at 32°F.
Specifications from the Miljoco-Weiss light powered NSF remote reading thermometer catalog and the current Miljoco-Weiss digital solar thermometer page. Verified 2026-09-01.
Manufacturer Warranty
Miljoco-Weiss warrants this product to be free from material defects in material and workmanship for 12 months from date of shipment, per the published Miljoco-Weiss terms and conditions of sale.
Warranty service requires written notice of the defect within seven days of discovery. Remedy is repair, replacement or credit at the manufacturer's discretion. Normal wear, corrosion, misuse and unauthorized modification are excluded.
- Product Type:
- Digital Thermometer
- Display Type:
- LCD
- Temperature Range:
- -40 to 160 F
- Power Supply:
- Light Powered
- Mounting:
- Surface Mount
- Sensor Type:
- Remote Sensor
- Sensor Lead Length:
- 5 ft
- Environment:
- Splash Proof
- Listings:
- NSF
- Application:
- Food Service
