ENMG / CABINET HUMIDITY CONTROL
MTH11
Mechanical cabinet humidistat
An adjustable mechanical relative-humidity controller with an integral sensing element and SPDT contacts, requiring no operating power for the sensing mechanism.
Request a quote ↗TECHNICAL DATA / MTH11
Specifications & selection.
- 35–95% RH setting range.
- Changeover contacts for humidity control or alarm applications.
- Vertical 35 mm DIN-rail installation.
| Parameter | Published specification |
|---|---|
| Setting range / stated tolerance | 35–95% RH / ±3% RH |
| Switching differential | Approximately 4% RH; source states at 50 °C—confirm condition |
| Response / permitted air speed | Approximately 5 seconds / 15 m/s |
| Contacts | SPDT snap action |
| Maximum switching voltage | 250 VAC, non-condensing environment |
| Minimum load | 100 mA at ≥20 VAC/DC |
| Resistive AC load | 5 A at 250 VAC |
| Inductive AC load | 0.2 A at 250 VAC, power factor >0.6 |
| Inductive DC load | 1 A at 50 VDC / 0.5 A at 75 VDC; source notation L/S = 3 ms requires clarification |
| Contact resistance | ≤50 mΩ |
| Electrical life | More than 50,000 cycles; test load not specified |
| Terminal / maximum torque | Three connections, screw terminal / 0.5 N·m |
| Conductors | Solid 2.5 mm² or flexible 1.5 mm² |
| Outline / mass in text | 67 × 50 × 38 mm / approximately 60 g; excludes knob and DIN clip |
| Housing | ABS; source specifies UL94 V-0 material; shown photograph is orange |
| Operation | 0–60 °C; ≤90% RH; no condensation or icing |
| Protection / reference conditions | IP20 / data at 25 °C unless otherwise stated |
Selection & installation notes
- The setting scale extends to 95% RH, but the operating humidity limit is stated as 90% RH. Confirm suitability before using settings above that limit.
- The source writes the DC inductive time constant as L/S rather than defining it. Obtain the exact load curve and contact diagram for inductive or DC loads.
- Control a suitably rated contactor when the load exceeds contact capacity; low-current electronic inputs must also meet minimum-load requirements.
- Heating can lower relative humidity without removing moisture. The source phrase about raising the dew point has not been used as an operating claim.
- Mount vertically in representative cabinet air, avoid heavy dust and water, and isolate load supplies before wiring. Confirm dimensions and housing variant with the quotation.
Based on the official Chinese product page and selection charts ↗. Checked 2026-09-15. Confirm the current specification for the exact model when ordering.
TECHNICAL RESOURCES
Plan your integration.
ENMG cabinet environment systems — English product-family brochure.
This is a product-family brochure. Request a model-specific datasheet and installation drawing with your inquiry.