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VM3501 Series Touch-Screen Dry Block Temperature Calibrators
The VM3501 series are portable touch-screen dry block temperature calibrators built for calibrating RTDs, thermocouples and temperature transmitters where the work is — onboard vessels, in workshops and in calibration laboratories. Four models cover -30°C to 1200°C; the 5.7-inch colour touch screen and 0.01°C resolution keep onboard checks fast, and interchangeable inserts fit the sensor sizes found in engine rooms.
Key features
- High accuracy & stability across four models, from -30°C to 1200°C
- 5.7-inch full-colour touch screen with 0.01°C display resolution — simple setup and operation
- Fast heating & cooling — the VM3501-650 reaches 650°C in 25 minutes
- Interchangeable inserts for a wide range of sensor sizes; special hole sizes can be customized
- Built-in protection — load short-circuit protection, load switch and sensor protection
- USB interface (optional)
- Data recording (optional) — up to 60 sensors and 600 records, exported over USB
- Chinese / English interface, °C / °F display
Model comparison — specifications
| Specification | VM3501-150A | VM3501-150B | VM3501-650 | VM3501-1200 |
|---|---|---|---|---|
| Temperature range | -20 to 150°C | -30 to 150°C | 35 to 650°C | 300 to 1200°C |
| Accuracy | ±0.1°C | ±0.1°C | ±0.35°C below 400°C, ±0.5°C from 400 to 650°C | ±1.2°C |
| Stability | ±0.02°C | ±0.02°C | ±0.05°C | ±0.2°C |
| Display resolution | 0.01°C | 0.01°C | 0.01°C | 0.01°C |
| Block diameter | Ø36 mm | Ø32 mm | Ø32 mm | Ø39 mm |
| Insertion depth | 160 mm | 160 mm | 150 mm | 135 mm |
| Heat-up to max. | 40 min | 40 min | 25 min | 75 min |
| Standard insert holes | 4 holes: 6 / 8 / 10 / 12 mm | 4 holes: 6 / 8 / 8 / 10 mm | Select one when ordering: 3 holes (8 / 10 / 12 mm) or 4 holes (6 × 2, 8 × 2 mm) | 4 holes: 6 / 8 / 10 / 12 mm |
All models: power supply 220 VAC ±10%, 45–60 Hz (110 VAC optional) · ambient 0–50°C, <95% RH non-condensing · touch screen, interchangeable inserts and customizable holes across the series; USB and data recording optional. Heat-up time measured from 30°C. Other temperature ranges and special hole sizes available on request. Full datasheet: VM3501 series overview (PDF). Looking for a wider range in one unit or dual-zone control instead? See the VM2550 series (-45 to 1210°C, 0.001°C resolution).
Applications
Marine. Onboard calibration of engine-room temperature sensors, transmitters and switches during routine maintenance and dry docking — a portable touch-screen unit the crew and riding service teams can operate without a laboratory bench.
Calibration laboratories. Everyday bench calibration of RTDs, thermocouples and temperature transmitters with fast heat-up and stable setpoints.
Industrial. Power, petrochemical, metallurgy, food and machinery plants calibrating their own temperature instrumentation on site.
Options
USB interface and data recording are available as options: the recording function stores up to 60 sensors and 600 records and exports the verification data over USB. Insert holes can be customized to your sensor sizes — please specify when ordering.
Frequently asked questions
Can the VM3501 be used onboard a ship?
Yes. The VM3501 is portable with simple touch-screen operation, and 110 VAC supply is available as an option — it is built for calibrating engine-room temperature sensors, transmitters and switches during routine maintenance and dry docking.
Which model should I choose for engine-room sensors up to 600°C?
The VM3501-650 (35 to 650°C). It heats to 650°C in about 25 minutes and holds ±0.05°C stability, covering the great majority of onboard temperature points.
Can the insert holes be customized?
Yes. The inserts are interchangeable and come in different hole sizes and quantities; special hole sizes can be customized — please specify when ordering.
Does the VM3501 record calibration data?
Data recording is an optional function: it records up to 60 sensors and 600 records, and the data can be exported over USB.
What is the difference between the VM3501-150A and VM3501-150B?
The 150A covers -20 to 150°C with a Ø36 mm block; the 150B reaches lower, -30 to 150°C, with a Ø32 mm block. Both hold ±0.1°C accuracy and ±0.02°C stability.
Ask Kate Liu about the VM3501
This site is a personal supply desk — you deal directly with Kate Liu, who checks the model and insert selection against your sensors before quoting, and inspects every unit before dispatch. Send the model number, or just describe what you need to calibrate, the range and where it will be used.
WhatsApp +86 139 5806 2364 [email protected]
Related: VM2550 dry block calibrators · all calibration instruments · Marine Solutions