The Miljoco-Weiss 56SD-U-30SS-03FT-NN is a light powered digital thermometer in a 2 in. round U-clamp case. In the HT configuration it reads -40 to 230°F or -40 to 110°C on a field switchable 3/8 in. LCD, operates from 15 Lux of ambient light with no battery, and uses a 3.0 in. x 1/4 in. stainless steel remote sensor on a 3 ft lead. This part number carries no LT or HT designator, so confirm the designator on order.
Overview
The 56SD is the low light member of the Miljoco-Weiss light powered family, rated from 15 Lux where the rest of the line starts at 30 or higher, which is the difference that matters inside a walk-in. The front face is waterproof, and the sealed sensor construction is the same design the manufacturer has published since 1992.
Typical Applications
- Walk-in coolers and freezers
- Low light refrigeration
- Food service equipment
- 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
Operates from 15 Lux
15 Lux is the lowest published light level of any Miljoco-Weiss light powered thermometer. The 25SD, 72SD and 20SD models require 30 Lux or more.
No battery, ever
Light powered under patent 5,196,781. Nothing leaks, nothing dies in the cold and nothing has to be scheduled for replacement.
Waterproof from the front
The front face is sealed for wash-down, which is the surface that actually gets hosed.
Field switchable °F and °C
In the HT configuration one instrument covers -40 to 230°F or -40 to 110°C, set in the field. Confirm the LT or HT designator on order.
U-clamp mounting
The U-clamp case clamps into the panel from behind, so the front face stays clean with no visible fasteners.
Stainless steel sensor for compression fittings
The 3.0 in. stainless steel bulb is the sensor the manufacturer specifies where the probe lands in a compression fitting rather than free air.
Technical Specifications
| Specification | Value |
|---|---|
| Measurement Range | -40 to 230°F and -40 to 110°C, field switchable (HT configuration). This part number carries no LT or HT designator. Confirmation required on order. See the source note below. |
| Accuracy | 1% of reading, ±1°F or ±0.5°C |
| Display | 3/8 in. LCD, 1/10 degree display up to 200°F |
| Case | 2 in. round back, 56 mm square front |
| Mounting | U-clamp case |
| Power | Light powered. No batteries and no supply wiring. |
| Light Rating | 15 Lux to 50,000 Lux |
| Sensor | NTC thermistor, 3.0 in. x 1/4 in. stainless steel |
| Sensor Lead Length | 3 ft |
| Environment | Waterproof from front |
| 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 from 15 Lux upward, the lowest light rating in the Miljoco-Weiss line.
What temperature range does this part cover?
The HT configuration covers -40 to 230°F and -40 to 110°C, field switchable. This part number does not carry the published LT or HT designator, so confirm the designator on order. See the ordering code note below.
What sensor is fitted?
NTC thermistor, 3.0 in. x 1/4 in. stainless steel, on a 3 ft lead.
Is the display sealed for wash-down?
The case is waterproof from the front. Protect the rear of the case and the lead as normal.
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 230 F HT, Confirm Designator
- Power Supply:
- Light Powered
- Mounting:
- U-Clamp
- Sensor Type:
- Stainless Steel
- Sensor Lead Length:
- 3 ft
- Environment:
- Waterproof Front
- Listings:
- NSF
- Application:
- Food Service
